Top 5 Diesel Engine Oil Brands In 2024 [You Can Trust]

Choosing the right diesel engine oil is a must to improve the performance of your truck or diesel engine. But it’s not easy to go for the correct engine oil as there are a lot of brands to choose from. And not every oil brand produces high-performance oil, especially diesel engines. 

To help you out in this case, we recommend you top 5 diesel engine oil brands you can trust. They are Royal Purple, Shell Rotella, Mobil 1, Motul, and Driven Racing oil. Below, we will break down everything about the diesel engine oil these brands deliver. So, keep reading. 

What Are The Best Diesel Engine Oil Brands?

Here is the list of the top diesel engine oil brands you can consider: 

  • Royal Purple
  • Shell Rotella 
  • Mobil 1
  • Motul
  • Driven Racing Oil

1. Royal Purple

Royal Purple is the best diesel engine oil brand that wins the first spot. The formulators of Royal Purple have over 200 years of expertise in developing high-performance lubricants. The main aim of this oil brand is to formulate and develop products that will outperform other synthetic and mineral oils in the market. 

When it comes to maximizing the performance and protection of diesel engines, Royal Purple is the go-to oil brand. Royal Purple uses premium base lubricants with proprietary additive technology to formulate the oil for diesel engines.

As a result, you will get unmatched protection and improved performance from the Royal Purple engine oils. The best part is-the diesel engine from Royal Purple is compatible with synthetic & regular motor lubricants. 

Therefore, Royal Purple carries the recent API and ILSAC engine oil licenses as well as the GM Dexos1 gasoline engine oil approval. It means you can go for the Royal Purple engine oils to enhance both the performance & protection of your diesel engines. Take a look at the following best diesel engine oils that come from Royal Purple: 

  • Royal Purple Duralec Super SAE 15W-40 Diesel Motor Oil
  • Royal Purple SAE 5W-40 High-Performance Synthetic Motor Oil
  • Royal Purple Duralec Super 15W-40 CK/4 Synthetic Diesel Motor Oil

2. Shell Rotella

Shell Rotella is another reliable oil brand you can trust to protect your diesel engine. It protects both your diesel and gasoline engines against deposits, sludge, and wear. 

Unlike other diesel engine oils, Shell Rotella is specially formulated with fully synthetic base oil. Plus, it incorporates Triple Protection Plus technology that delivers superior engine cleanliness and optimum protection against thermal breakdown, deposits, and metal frictions.

Therefore, diesel engine oils from Shell Rotella maximize fuel economy without sacrificing engine protection or durability. 

Turns out, strong oxidation protection ability makes Shell Rotella Diesel Engine oil unique from others. It prevents acid or oil thickening from forming in your diesel engine to ensure engine cleanliness. Below, we mention some of the best Shell Rotella diesel engine oils. 

  • Shell Rotella T5 Synthetic Blend 15W-40 Diesel Engine Oil
  • Shell Rotella T6 Full Synthetic 5W-40 Diesel Engine Oil 
  • Shell Rotella T4 Triple Protection Conventional 15W-40 Diesel Engine Oil

3. Mobil 1

Mobil 1 is a world-renowned oil brand. Thousands of vehicle owners trust this brand to protect their engines for years to come. This oil brand claims their synthetic oil brand keeps every moving engine part in good condition for 250000 miles. 

The synthetic blend of diesel engine oil from Mobil 1 enhances engine performance and extends your diesel engine life by protecting it against sludge, wear, and deposits.

Every diesel oil from this brand is specially formulated that meets OEM requirements and delivers high performance both in on-road and off-road conditions. 

Apart from these, the Mobil 1 oil maximizes oil drain interval by up to 1.5x and enhances wear protection by up to 50%. On top of this, the diesel engine oil from Mobil 1 delivers exceptional oxidation stability, smooth, and viscosity control. Here is the list of the diesel engine oil you can go for that comes from Mobil 1: 

  • Mobil Super 96819 15W-40 Delvac 1300 Motor Oil
  • Mobil 1 112786 Delvac 1300 Super 15W-40 Diesel Engine Oil

4. Motul

Motul started its journey in the oil industry about 160 years ago and it still produces high-quality and high-performance engine oil. This oil brand includes synthetic oil, regular oil, diesel oil, and others in its lineup. 

When it comes to the protection of your diesel engine, Motul is the name you can rely on. It uses advanced additives and oil properties to ensure optimum engine protection & performance.

The diesel oil from this brand resists oil film at higher operating temperatures and reduces wear & tear. Therefore, the Motul oil maintains and provides stable oil pressure in every operating condition to ensure maximum engine protection. 

Below, we enlisted some popular engine oils from Motul for diesel engines. 

  • Motul 007236 8100 X-cess 5W-40 100 Percent Synthetic Gasoline and Diesel Engine Oil
  • Motul MTL102870 007250 8100 X-cess 5W-40 Synthetic Gasoline and Diesel Engine Oil
  • Motul 007236 8100 X-cess 5W-40 100 Percent Synthetic Gasoline and Diesel Engine Oil

5. Driven Racing Oil

Driven Racing Oil is a popular oil brand for producing advanced engine oil for racing cars. But now, their innovation extends beyond the race track to the street and more.

Every engine oil they manufacture is designed to maximize engine performance by protecting the engine against sludge, deposits, and friction.

Unlike other oil brands, Driven Racing Oil incorporates metallocene polyalphaolefins technology. It provides exceptional protection against wear. Therefore, the diesel oil from this oil brand lubricates every moving part both in warm and cold weather conditions. 

Now, take a look at the following engine oils you can trust to ensure maximum lubrication & protection. 

  • Driven Racing Oil DP40 Synthetic 5w-40 Turbo Diesel Motor Oil
  • Driven Racing Oil DBR Conventional Diesel Break-In Oil 15w-40 Motor Oil

Can You Mix Different Brands of Diesel Engine Oil?

Yes, you can mix different brands of diesel engine oil as long as the viscosity and the API rating are the same. Otherwise, you can’t mix diesel engine oils that come from multiple brands. 

However, we don’t recommend you blend oils from different oil brands. Oil nowadays is not oil anymore.

Every oil brand uses unique additives and chemicals to enhance lubrication and performance, and prolong the engine life. Some of these additives may react with other brands’ oil. So, it’s better to stay in a safe position. 


Is 5W40 good for diesel engines?

Yes, the 5W40 is good for diesel engines. It will flow to your car engine at 5 degrees and ensure optimum lubrication to ensure superior engine protection. 

What oil should I use in a high-mileage diesel?

A heavy oil grade like 5W-40 is the best engine oil for a high mileage diesel engine. It ensures superior lubrication and protection. 

Is 15w40 good for diesel engines?

Yes, 15W40 oil is good for diesel engines. This oil grade provides maximum engine protection both in on-road and off-road conditions.


Royal Purple, Shell Rotella, Mobil 1, Motul, and Driven Racing Oil are the best oil brands for diesel engines. You can go for any of the brands and pick the oil from them to ensure optimum engine performance & protection.

Fortunately, we also mentioned two-three diesel oils from each brand. So, you don’t need to hassle to find the best diesel engine oil. Now, it’s up to you which brand you will pick to lubricate your diesel engine. 

About John M

John contributed as a technical head at an automobile company just 2 years after his post-graduation in Automobile Engineering. He loves to lead a free life, so he left his job & started blogging. Now, he does research on every automotive problem, part & product and seeks a better solution & best products & shares his findings with his readers to help them as well as to minimize their struggle.

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