Top 9 Best Oil for High Mileage 5.3 Vortec In 2024

You are confused among the hundreds of motor oil brands to pick the best oil for high mileage 5.3 Vortec engine. Here our experts have put their efforts doing a depth in research based on the users’ experiences and their feedback. And finally, they have picked the top-quality oils for your high mileage 5.3 Vortec.

We will be talking about the useful features of these oils, what benefits the users find, and the downsides of these oils also. So, keep reading…

Best Oil For 5.3 Vortec Comparison Chart

Product	Special Key Feature	Benefit
Castrol 03128C Edge	Titanium Extra Fluid Technology	Smoother Engine
Royal Purple 11748 HMX	LSPI Protection	High Mileage
Mobil Full Synthetic	Wear Protection	Engine Parts Protection
AmazonBasics High Mileage	Rust and Corrosion free Technology	High Mileage
Castrol 03102	Oil Burn Protection	Advanced Sealing
Valvoline Motor Oil	MaxLife Technology	Higher Mileage
Pennzoil Platinum	PurePlus Technology	Better Piston Performance
Valvoline SAE 5W-30	Anti-Wear Film Protection	Smooth Engine
Havoline 223394474	Thermal Breakdown Protection	Better Engine Performance

What Happens If Oil Not Change On 5.3 Vortec Timely

If you don’t use the right oil and change it timely, your Vortec engine will face many serious issues gradually. The main issues that will face your Chevy 5.3 Vortec engine are:

• The mileage will be decreasing day by day
• The oil filter will lose its capability
• The oil filter O-Ring may not act properly
• Overall, it will impact the engine performance and lead to engine damage finally

So, you should take improved care to protect your engine and change the oil at the right time.  

How To Choose The Best Oil For High Mileage Chevy 5.3 Vortec

You should consider the following factors while choosing oils for your 5.3 Vortec engine with a mileage of over 75000 miles.

1. Wear Resistance

Wearing issues make the engine weak. So, you need an oil that comes with wear resistance features to give better care and maintain your Vortec engine. There are some specific oils that handle the wearing issues perfectly and improve performance. You will know all about those oils below.

2. Extra Protection

Engines lose their performance for carbon buildup and white sludges. Advanced motor oils do not give space to those issues. They keep the engine better lubricated and give a better ride. So, choose those oils that provide your engine extra protection to prevent wear and sludges.

3. Film Layer

A few improved oil has film layer technology that applies film layer on engine parts to ensure better protection. The oil acts as a protection for the parts, in this case, no wearing, sludge, and buildup issues cannot increase in these cases. So, don’t forget to pick those oils that are enriched with advanced film layer technology.

4. High Mileage

Synthetic oils are good for high mileage and smooth riding. If you use synthetic motor oil with general oil, the performance increases. So, finding synthetic elements will also give better results on your Vortec with many miles. 

5. Better Drain Interval

You need to check out the oil drain interval issues. As higher the drain interval is, it will give better performance. There will be less fuel loss and the engine will be in good shape too. 

6. Cleaning Elements

A very few vehicle oil comes with this feature. It cleans the engine parts internally and never allows sludges and other particles to hamper the engine. So, assure the oil that you are choosing features the engine cleaning element.

While getting the oil for your car, just make sure all these factors which will give you hassle-free with easy maintenance. And fortunately, the oils that we have picked for your 5.3 Vortec with great mileage come with all these engine protection features.

When To Change Oil On Chevy Silverado

Generally, motor oils need to change after each 7,500-10,000 miles. It is a common service your vehicle needs on a regular basis. But it is best for Silverado to change oil and filter after each 3,000-5,000 miles.

Not only this, you need to change the 2021 Silverado 5.3 oil filter too while changing oil for better engine care. And thus you can get a better engine experience from your vehicle. So, we will suggest you, do the on-time oil change.

Best Oil For High Mileage 5.3 Vortec Engine- Explained

Here are all about the oils our experts have enlisted, their features, and how they benefit your Vortec engine and protect it.

Castrol 03128C Edge High Mileage Oil

The most loving things from this oil are the better care of engine issues with finer fuel economy and improved mileage. Getting better mileage from an old engine is a real miracle from this vehicle oil.

Key Features:

• Uses  titanium technology
• Used extra fluid  technology
• Applied advanced film layer

Features & Benefits

Now let’s know how the advanced features used in this car oil will benefit your car engine:

Titanium Extra Fluid Technology

As we told you earlier this many mileage oil is made using titanium technology. The integration of extra fluid technology with a 100% synthetic principle will dramatically boost your car engine performance over 75,000 miles. It is the perfect  5.3 Vortec oil type.

Plus its titanium technology will give your car better film strength and minimizes film breakdown. It will effectively work on leaks, oil burning ratio, and power-robbing issues.

It is the technology used in the aerospace industry, and this protean keep the engine smooth with better care. It is also environmentally friendly and a better choice for engine care. 

Better Fuel Economy

The use of this vehicle oil will keep the engine away from sludges and ensure better mileage. Only by using this, you can keep your engine running over 75000 miles.

Steady Film Layer

The advanced film layer keeps internal parts safe. It reduces friction and gives 30% more strength with this steady layer. You will experience a low frictional state.

What We Like:

• Better engine performance
• Reduce engine slugs
• Reduce Leaks
• Reduce oil burn off
• Improved fuel economy

What We Don’t Like:

• Should be careful about US and EU spec of the oil

Users’ Experience [97% Happy Users]

Most of the users are extremely happy using this Castrol high mileage oil. You can check their experience and high ratings. But, a few users are severely criticizing the oil and they are happy with a few facts.

For Example:

“Raz V, an unhappy user, bought this Castrol oil for his BMW LL04. He blames that this oil product description tells Castrol C3 with BMW LONGLIFE 04 rated but on the product level he didn’t find any approval mention on the product level for BMW LONGLIFE 04.”

Like Raz V, a few other users (only 3%) opine the oil is pricy and aren’t happy with this Castrol mileage oil though their experience doesn’t go with the oil quality.

However, 97% of the users are highly happy using this top oil in their vehicle and they don’t forget to write their experience with the highest ratings.

So, you can get this Castrol synthetic moto oil to keep your engine smooth and have better mileage.

Royal Purple 11748 HMX Motor Oil

This is a real solution for minimizing wear and it will restore the lost performance of your car.

Key Features:

• Better protection against LSPI
• Anti-wear additive included as Zinc and Phosphorus
• Improved drain intervals
• Oxidation stability

Features & Benefits

This synthetic oil comes with advanced features to ensure better mileage and adds value. The oil is engineered to take proper care of your engine. So it gives advanced protection to your car. It will even bring life to your old engine to perform one step ahead.

Protection against LSPI

You know that LSPI damages car engines. So you need an oil that works fine against LSPI. This oil is a good choice for the task which will minimize the LSPI damages and start restoring the engine performance. 

Due to LSPI pressure, the cylinder, cylinder wall, piston, and other parts of the engine get damaged permanently. But if you use this oil, you will find it working as a position for the engine to give better mileage. 

Anti-Wear Additive

Dirt, soot, and dryness will wear your engine day by day. But you can prevent it by using this Royal Purple oil that comes with both Zinc and Phosphorus. The oil will keep your engine parts oily and free from sludges. It also includes the 2005 5.3 Vortec oil type, too.

This anti-wear additive included motor oil will higher the lifespan of your engine. You will both get improved performance and better engine condition with this oil. 

Improved Drain Intervals

Let me tell you about the oil contamination and the bad effects. You will see ring wear and engine shocks that cause increased drain interval and give hassle.

The royal purple HMX motor oil will give you an improved drain interval that will give smooth operation of your engine. This is also best oil for high mileage 4.8 Vortec. 

What We Like:

• Minimized wear issues
• Better engine performance
• Reduce Leaks
• Decreases engine deposits
• Better corrosion protection

What We Don’t Like:

• In few cases, the packaging is not good

Users’ Experience [98% Happy Users]

In the case of royal purple HMX synthetic oil, 98% of users are extremely happy. They find the oil works great even in freezing outside and best for the money. You can read theirs practical happy experiences before picking the oil.

“But a little number of users criticize the oil. Ben Dagrin finds the oil short-lasting. He used the oil in his 08 Nissan pathfinder and found oil got darker after 1500 miles. Stephen Franz, another user was unhappy with the oil packaging.”

However, as over 98% of users find oil super good, you can undoubtedly grab this oil for your Silverado and stay in peace. It will certainly give complete care to the engine and you will see the changes in the car performance like many others users.

Mobil Full Synthetic Motor Oil

The right type of auto oil can change your engine performance and Mobil 1 high mileage motor oil does not need any explanation. 

Key Features:

• Wear Protection and proper lubrication
• Improved Technology
• Protects Engine Parts
• Sludge and Deposit Prevention

Features & Benefits

Knowing the right features will give a clear vision of the oil, so I will tell you about them now in detail. 

Mobil is a renowned name that makes excellent quality oils for your car engine. You will live hassle-free when using this Mobil 1 mileage oil and it will give you boosted performance in your engine.

Wear Protection and Lubrication

I have faced engine wear issues in my own car, so it is both a hassle and affects the engine performance. When you use this oil, you will enjoy the wear protection and lubrication features. 

This Mobil synthetic motor oil fights with the dirt and dryness issues in the engine and improves the performance gradually. On the other hand, for better lubrication, the engine parts will last longer. This oil is a perfect solution for Vortec engines. 

Improved Technology

This oil is a great combination of wear protection, sludge protection, prevent leak, and high mileage. It is the result of researched engineering from Mobile. They have again presented a good solution that looks after your engine with proper care. 

Protects Engine Parts

You know that our engine parts get old and rusted due to a lack of lubrication and dirt. It comes with all the parts care issues and keeps our parts lasting for a longer time. You will enjoy using the oil for your engine.

What We Like:

• Anti-wear and lubrication care
• Better mileage
• Protects engine parts
• Reduces sludge and deposits
• Prevents leaks

What We Don’t Like:

• Oil bottles should be checked if have any leak issues

Users’ Experience [98% Happy Users]

As you can see Mobil 1 engine oil is the number 1 best seller oil. So, it doesn’t need to explain how happy are users! More than 98% of users are super happy using this fully synthetic motor oil. Just take a glance at how happy the users are.

But, only 10 users blame silly issues. Kodiak, a user complains about the container quality but is happy with the oil. Benny Wang, another user blames the same issue. And the rest few blames scattered.

However, finally, we can declare, there is no reason to avoid this number 1 best seller Mobil synthetic oil. Simply pick this top oil to make your driving experience easy. 

AmazonBasics High Mileage Motor Oil

This is an advanced technology motor oil from AmazonBasics. After knowing the features and its sky-touching popularity, we believe, you will feel that you need to get this synthetic oil for your Vortec.

Key Features:

• Rust and Corrosion free technology
• Engine wear protection
• Longer drain interval
• Mileage over 75000 miles

Features & Benefits

I will now tell you about the advanced features and the benefits of this oil.

Rust and Corrosion Free Technology

When your Vortec engine is suffering from rust and corrosion, then this oil is a perfect solution.  

You know powerful Vortec engines need special care. And interestingly, this amazon basic oil is engineered to maintain such powerful engines. It minimizes the rust and corrosion issues by lubricating the inner side properly. 

Longer Drain Interval

The drain interval feature is really lovely where you will see that it maintains a longer drain interval. Frequent drain intervals make the engine dry and require more oil.

This oil managed the issue with proper engineering and care. It is a good choice as the best oil for 5.7 Vortec with more than 75000 miles.

Engine Wear Protection

Engine wear issues are caused by contamination and external particles. This oil seals the inner gaps of engines and gives the engine protection against wear. 

What We Like:

• Mileage over 75,000 miles
• Longer drain intervals
• Rust and Corrosion free
• Reduces friction
• Reduced exhaust emission

What We Don’t Like:

• It lacks clear visibility strip

Users’ Experience [97% Happy Users]

Its high popularity tells how good the oil is. 97% of users are super happy using this Amazon Basics synthetic oil. And surprisingly, the users who are criticizing are not unhappy with the oil quality. They declare the oil is good but complain against the package and oil bottle.

So, you can definitely pick the oil for your Vortec with a lot of mileage.

Castrol 03102 Motor Oil

Here we will talk about the advanced Castrol 03102 synthetic Oil that is another good engineering from the manufacturers. 

Key Features:

• Anti Deposit build up
• Oil Burn off protection
• Seal Conditioners
• Anti Engine wear additives

Features & Benefits

Here we will discuss the advanced features and the benefits that make it one step ahead of other oils. Good oil can heal all the issues of the engine, maintain it for a longer time, and give comfort in driving. 

Anti Deposit Build Up

As we know, deposits occur on intake valves that absorb fuel and harm the engine. In some cases, it hampers the combustion chamber, but this oil is developed to fight against all these issues.

It keeps the engine in good condition and boosts up its performance. An oil like this one is the right solution for keeping the engine in the right shape. You will love this oil, which will keep you hassle-free for a longer time. 

Oil Burn Off Protection

Generally, Oil burn issues consume more fuel and minimize the amount of oil. In the case of this car oil, it is engineered to prevent oil burn off better than other oils.

It saves fuel consumption and keeps the engine lubricated for a longer time. 

Anti Engine Wear Additives

Engine wear issues are caused by contamination and external particles. It manages the issues well and seals the inner gaps of engines; also gives the engine protection against wear. 

What We Like:

• Prevents deposit build up
• Upgraded oil burn off
• Comes with Seal Conditioners
• Have better mileage

What We Don’t Like:

• Does not suit all kinds of engines

Users’ Experience [97% Happy Users]

“97% of users give a positive review as they find the oil as great. You can read what they say before picking the oil for your Silverado. Only a few users find oil pricy and complain the oil doesn’t match the picture.”

However, as most of the users are highly positive about this, you can definitely pick this synthetic high mileage oil for your Vortec. Using this upgraded oil will give you a long time of maintenance-free driving experience.   

Valvoline MaxLife Technology Motor Oil

It comes with advanced and upgraded technology to make your engine perform well and give better performance.  

Key Features:

• Anti-Wear Additive Film Layer
• Detergent  formula for sludge and deposits
• Premium Seal Conditioners
• Superior Antioxidants

Features & Benefits

We will now talk about this oil that has one step ahead technologies to give our engine extended life. 

How about your 5.3 Vortec engine that uses this oil and gives better performance? Let’s discuss it. 

Anti-Wear Additive Film Layer

We always suffer from engine wear issues, where our engine parts get weak day by day. But this oil gives anti-wear protection and applies a film layer on engine parts to keep them safe from wear. 

This film layer technology keeps the engine parts covered. You can enjoy smoother engine performance and get better riding comfort.

The Detergent Formula for Sludge and Deposits

We know sludge and deposits minimize the engine performance. This oil comes with innovation and has a detergent formula, that keeps away sludge and deposits from engine parts and makes them perform better.  

Premium Seal Conditioners

The amazing seal conditioners in this oil are very effective to seal any leakage and gaps that may give us hassle later. You will enjoy the leakage-proof feature very well and get better performance. 

Superior Antioxidants

In extreme conditions, oil’s core elements break down and you will lose fuel. The Antioxidants formula is a complete solution for these types of issues. It is also the best oil to use in 327 Chevy.

What We Like:

• Better engine performance
• Higher Mileage
• Fuel Efficiency
• Better engine care

What We Don’t Like:

• The sealing feature is not good

Users’ Experience [97% Happy Users]

“You will be surprised reading the happy users’ experience. They find oil supper effective with their many mileage vehicles. Even the career mechanics and dealers are also highly appreciating the oil. But, they suggest, to get the perfect result, you need to wait for 2 oil changes and should not go beyond 5k for a better result.

But, a little number of users complain about the package, jug leaking, and sending the wrong product while buying online.”

But, finally, we can say the oil comes with some superb features that make your engine give an extended performance as it could do with thousands of users. So buying this one will give your high mileage engine a smooth ride and ultimate engine care. 

Pennzoil Platinum High Mileage Oil

You will find this high mileage oil, manufactured for your 5.3 Vortec engine and give you splendid performance for years.   

Key Features:

• Gas-to-liquid PurePlus Technology
• Keeps pistons Clean
• Upgraded protection from friction

Features & Benefits

This oil gives excellent performance and you use it for over 75,000 miles It is another perfect suit for Vortec engines. For a high-powered engine, this is a complete care solution.  

Gas-to-liquid PurePlus Technology

This is a new technology from Pennzoil. It is not manufactured from crude oil, the gas to liquid technology gives a light and smooth oil for your engine. This amazing oil will give complete care to your engine.

PurePlus Technology is a stand-alone new technology that other motor oil companies do not have. It gives better and smoother maintenance for the engine. 

Keeps Pistons Clean

Sludge and corrosion are common issues for Pistons. We can get better performance from this one which keeps the pistons clean and keeps functional. It increases the piston function by an additional 45%. 

Upgraded Protection from Friction

Friction depends on both horsepower and brake horsepower. It weakens the engine day by day, but from this oil, you will get better and advanced protection against friction.

You will enjoy each day while using this oil. It also works with increasing 5.3 Vortec oil capacity. 

What We Like:

• Full synthetic
• Ensure high mileage
• Better piston performance
• Less Oil Burn
• Protects from losing horsepower

What We Don’t Like:

• May not suit all engine types

When you are getting so many excellent and amazing new things from this engine oil, why not get one now?

Users’ Experience [97% Happy Users]

Most of the users(97%) have reviewed this oil positively. They find it good additive and high mileage ambrosia for their older and tired engines. One of the users named Jeff is so happy that he announced this oil ” Top quality oil”.

Well, a few users have an objection to this oil. For example, C Diaz, a user has an only problem is that Pennzoil jugs don’t have a seal but other things are okay like quality, inexpensive, etc.

So, you can pick the oil for your vehicle without a second thought.

Valvoline SAE 5W-30 Synthetic Blend Motor Oil

This is another excellent motor care solution from Valvoline. You will find it very effective on 5.3 Vortec engines.    

Key Features:

• Thicker Anti-wear Film protection
• Premium Seal Conditioners
• Extra Detergents against sludge and deposits
• Superior Antioxidants

Features & Benefits

You will get tension-free maintenance that will give you year-round performance and comfort in the driving experience. It comes with many advanced features for your engine. Let me share all the features and benefits here with you.  

Thicker Anti-wear Film Protection

Wearing issues make our engine weak and make sounds. While using this oil, it comes with anti-wear film layer protection. It applies a film layer on engine parts, that keeps them lubricated and allows them to perform better.

When the engine parts are better lubricated, they are away from any kinds of particles and give a smoother performance. It is a great solution for our engine. 

Premium Seal Conditions

We know leaks and gaps in the engine cause corrosion and weakness. The lifespan of the engine gets less. This oil comes with a sealing feature that will give extended life to your engine by minimizing leaks and gaps. 

Extra Detergents Against Sludge and Deposits

Having detergent power in motor oil is amazing. It fights against sludges and deposits, keeps them away to maintain the engine in the right order. You will have a sludge and deposit-free experience with your engine.  

Superior Antioxidants

It comes with antioxidants that keep the engine safe from oil breaking and fuel loss. It will give you complete safety from oxidants and as a driver, you will enjoy a better driving experience. 

What We Like:

• Maximize engine life over 75,000 miles
• Better engine care
• Smooth engine
• Prevents leakage

What We Don’t Like:

• The cap is not well designed, there are possibility of leakage

You will just love the superb benefits of this vehicle oil. So it will be a wise decision to get the oil for your car.

Users’ Experience [98% Happy Users]

“Best high mileage oil I have tried,” said L. Brown, one of the users. 98% of users like him are satisfied with this oil as they don’t get any oil-related failure. They also find a better solution for the engine with a little leakage of oil. To get the result you have to wait for 2 oil changes at least.

Well, happy users say, “the quality is outstanding for the price”.

However, 1 or 2% of users have issues with a weak seam of the jug but they are happy with the oil quality.

So, you can take the oil and give your vehicle a new journey.

Havoline 223394474 Motor Oil

Havoline is a reputed name in the industry who are manufacturing quality oils for different types of engines.    

Key Features:

• Anti-wear protection
• Thermal Breakdown protection
• Engine Cleaning Technology

Features & Benefits

Now we will talk about the benefits and features of this oil. It keeps the engine well maintained and gives a hassle-free experience. 

The modern and advanced technologies from this oil give us comfort and longer life of the engine. 

Anti-wear Protection

I tell you here that, we may not notice the wear issues in the engine closely but it weakens the engine day by day. This oil has an advanced anti-wear protection feature that takes care of all issues from wearing. It keeps the engine lubricated and runs smoother than ever. 

It gives the care to make up for the wearing issues in engine parts and improve the engine performance day by day. This is a perfect oil type for engines. 

Thermal Breakdown Protection

It keeps the engine cool and smooth so that no thermal breakdown happens in the fuel issues. Due to this kind of breakdown, there is both fuel and motor oil. It causes more cost in maintenance and mileage too. 

Engine Cleaning Technology

External particles make our engine operation complicated. Also, they damage the engine parts. It comes with advanced features to clean the internal parts of the engine, better lubrication, and a smoother experience. 

What We Like:

• Longer Engine life
• Smooth engine experience
• Less Oil Breakdown
• Anti-wear  and leakage protection

What We Don’t Like:

• Sealing technology is not good

This oil does some amazing improvements to the engine, so you will love it a lot. So, just get one of these and start using it.  

Users’ Experience [97% Happy Users]

Almost all users are confident to pour Havoline into their car engine as it does the job well without any issues even for older engines. The oil is convenient, inexpensive, and high quality to them. So, they feel comfortable using this oil for their daily family car use that fits the bill.

Well, a few users have complained about the packaging but they are happy after using the oil without any issues. So, if you are thinking of a quality mileage oil at a cheap cost, you can pick Havoline without any hesitation.

What is High Mileage Oil?

High-mileage motor oil is specially formulated to meet the challenges every high-mileage car encounters. Emissions, smoke, and oil consumption are a few examples every vehicle with 75000 miles goes through. And the high-mileage oil will help to boost the overall engine performance by tackling those problems. 

Which Cars Need High Mileage Oil?

When your car hits the 75000 miles mark, you need to pour high mileage oil to support the engine to fight against oil consumption. Classic or older cars also get benefits from the high mileage oil.  

What is Synthetic Oil?

Synthetic oil is a man-made oil that comprises artificially made chemical compounds. Generally, chemically modified materials like petroleum components are used to create synthetic oils. However, the manufacturing process of synthetic oil will vary based on the manufacturer. 

Benefits of Synthetic Oil

The benefits you can enjoy by pouring synthetic oil into your car are uncountable. It will extend your engine life by protecting your engine from oil breakdown, oxidation, and sludge. Therefore, it improves the oil economy as this reduces stress on your engine by decreasing metal frictions. 

What is 5W-30 Oils?

5W-30 is a type of oil that is widely used in light-duty car engines. It’s a multifunctional oil. The viscosity grade of this oil at low temperatures is 5 and the hot viscosity grade of it is 30 at high temperatures. 

How 5W-30 Oils are Different from Other Oils?

The value left to the W determines the viscosity grade of the oil in low temperatures. For example, the winter viscosity grade of a 5W-30 oil is 5. It means it’s less thick in too low temperatures compared to the 10W-30 oils. 

On the other hand, the value right to the W determines the viscosity grade of the oil in high temperatures. The 5W-30 oil has a hot viscosity grade of 5 and it is less thick at high temperatures. 

Cheap Synthetic Oil

Here is the list of the cheap synthetic oil:

• Castrol 03128C Edge High Mileage 5W-30 Advanced Full Synthetic Motor Oil
• AmazonBasics Full Synthetic Motor Oil 
• Valvoline Advanced Full Synthetic SAE 5W-20 Motor Oil
• Castrol 03124 Edge 0W-20 Advanced Full Synthetic Motor Oil
• Pennzoil 550046127 Platinum Full Synthetic Motor Oil

Can I use Semi-Synthetic Oil on my High Mileage Car?

Yes, you can use semi-synthetic oil on your high mileage or old cars. It will protect your car engine when driving under extreme weather conditions. The idea ‘Semi-synthetic oil is bad’ comes from the fact that the older synthetic oil contained chemical compounds, which could damage the engine seal. 

Synthetic Oil vs Regular Oil

The main difference between synthetic oil and regular oil is- synthetic oil will not break down quickly compared to conventional. It means synthetic oil stays in your engine compartment for a longer time and provides better protection than conventional oil. 

Synthetic Oil Change Cost

Typically, you need to spend double when it comes to synthetic oil change. The price range of changing synthetic oil is between $65-$125.  

How To Change Oil on The Chevy Silverado

Here is the step-by-step guide that helps you to change the oil on the Chevy Silverado. 

• Make sure you have these pieces of equipment at your fingertips- the oil filter cap tool, oil filter, right type of synthetic oil for your Chevy , drainage pan, and funnel. 
• Remove the dipstick and check out the oil level. 
• Remove the fill cap.
• Lift your car and get underneath your vehicle. 
• Locate the oil filter and drain bolt under your car engine in front of your Silverado. 
• Use a wrench to remove the drain bolt and washer.
• Ensure you place the drainage pan in the right spot. Once you pull the drain bolt out, the oil will start draining. 
• After draining the oil, set the drain bolt in its place. 
• Use a filter wrench to loosen your filter to drain the oil and remove the oil filter from there. 
• Now, install a new oil filter.
• Pour oil into your car engine. Ensure you pour the right types of engine fuel for your Chevy according to the manual. 
• Replace the oil cap and start & stop your car engine.
• Finally, check the oil level again. 

How to Fix Low Oil Pressure on 5.3 Vortec

Oil pressure may decrease on your 5.3 Vortec for several reasons. For example, if the oil pressure sensor gets defective, the oil pressure may go down. Therefore, a damaged oil filter and oil pump may be responsible for low oil pressure. 

To fix the issue, replace the oil pressure sensor and oil pump as well. After replacing them if you get no luck, it’s time to change the oil filter. So, get a new oil filter like AC Delco PF48E and do a proper oil change.

Now, check the gauge and you will find oil pressure is now normal. I mean, at warm idle, you will find it within 25-40 PSI and at speed driving, you will notice it within 40-70 PSI. 

How to Fix 5.3 Common Oil Leak

Three reasons are responsible for the oil leak on your 5.3 liters engine. They are- 

• A tripped or faulty engine gasket 
• Loose oil cap 
• Defective oil filter adapter

Overheated engine, oil residue or droplets under your vehicle, and smoke coming out of your car engine are the sign of a faulty engine gasket. On the other hand, worn out or damaged oil caps are also a reason behind oil leaks. 

Low oil pressure, overheated car engines, and metallic sound coming from the engine are the signs of a faulty oil filter adapter. 

Replacing or repairing all three components or any of them (that one gets damaged) will help you fix the 5.3 Common Oil Leak. 

When to Change 5.3 Vortec Oil Filter

It’s recommended to change the oil filter at every oil change time. It’s suggested because if you don’t change the oil filter at the time of oil change, the filter becomes clogged which hampers the oil passing through the oil filter to the engine. 

As a result, the engine will suffer a lot. And thus internal engine components will be exhausted and finally, the engine will be damaged. So, don’t forget to change the oil filter at every oil change. It will cost you a few dollars but save a buck.  

When to Change 5.3 Oil Pump

There is no hard and fast rule when you should change the oil pump. As long as the oil pump doesn’t get faulty, you don’t need to replace it. But you should change the oil pump if you notice the following signs-

• Low oil pressure
• Your vehicle could make a loud noise
• Overheated car engine

Indeed, it would be best to change the oil pump when it gets defective. 

Functions of 5.3 Vortec Oil Pan

Oil Reservoir is the best phrase to define the oil pan of your Vortec 5.3. The oil pan is the place for oil to stay if your car engine is not running.

It also keeps oil cool when the oil passes over the pan surface. Therefore, an oil pan lets the contaminants in the oil settle down and helps to drain the old oil.

When to replace 5.3 Vortec Catalytic Converters?

Catalytic converters can last for a lifetime. However, sometimes it may get faulty and you need to change it. Generally, Catalytic Converters will stay well-shaped for 10 years. After that time, you can change them if they get damaged.

When to Change 5.3 Vortec Air Filter

Actually, it depends on how many miles and in what conditions you drive your car. According to the Chevy Silverado Service Manual, you should change the Votect air filter every 10K miles in extreme driving conditions. In normal driving situations, it is recommended to replace the air filter every 15K-30K miles. 

How To Remove Engine Sludge

Flushing your car engine with engine sludge remover is the best yet easiest way to remove the sludge buildup. So, get sludge remover from your local market and add the chemical with the old oil. 

Then, pour them into your engine as you do regularly. Next, idle your car engine for 5-10 minutes. Give the sludge remover sometimes to dissolve the sludge. Finally, drain the oil filter, and you can see all of the sludge come along with the old oil. 

What is the Best Oil for 1500, 2500, and 3500 Pickups?

SAE 0W-30 Oil is the best oil for all the 2500 and 3500 Chevy Pickups.  On the other hand, you can try SAE 0W-30 or SAE 0W-20 Oil will be your go-to oil type for the Chevy Colorado or Chevy Silverado 1500. 

FAQ:

Final Words

As we have talked about the best motor oil for high mileage Chevy Silverado 5.3 Vortec in this article, we have shared all the related information with you. We hope, our article will help you to pick the best oil from the shortlist and thus maintain your Vortec engine.

But, when you are looking for 5.3 engine oil recommendations from us, we will tell you to pick either Castrol Edge High Mileage Motor Oil or Mobil Full Synthetic Oil. Whether you have a gasoline engine or diesel engine from any Chevrolet Silverado models, both are highly effective for 5.3 engine care.

Note: You can find the 7 best oils for you Infiniti g35 & g37