5 Best Diesel Motor Oil In 2023

To get overall performance from your vehicles, you need to correctly take care of your engine. Typically, if you can choose the best diesel motor oil for your engine, you can quickly improve your performance. Besides this, to improve your vehicle’s overall well-being, these steps also can help you.

Don’t take any confusion about standard motor oil. It comes with higher part additives than any other motor oil. You know diesel engines can make shoots and byproducts from burning, so choosing the right oil is essential.

Overall, though diesel engine needs extra maintenance, peaking the suitable types of oil is a great idea. Well, if you think which diesel oils are best for your diesel engine? Here is the proper guide.

best diesel oil

What Is the Best Diesel Motor Oil?

Proper maintenance of diesel motors can improve your vehicle’s life. But most people ask us what the best motor oil is. Actually, we know all motor oils do not come with a similar. But if you choose the best diesel motor oil for your diesel engines, it can help your engine last longer. Even so, because of it, you can avoid frequent oil changes. To know about it, you need to know the types of diesel motor oil.

Types Of Best Diesel Motor Oil

First have to decide what types of oil you need to use, like traditional or synthetic oil. Traditional oil is mineral oil and includes some impurities. On the other hand, though synthetic oil is a manufactured product, it replicates crude oil.

So, it has no harmful impurities, and its additive can improve engine life and performance. You know synthetic oil is an expensive product, and this matter is not an irritated matter. It’s because for your diesel engine, using synthetic oil is best. The reason is that synthetic oil always gives you a surety of the safety and health of your machine.

Everyone always wants to use the best diesel motor oil for their diesel engine. Nevertheless, diesel motor oil has many additives that work to develop the performance and longevity of diesel engines. Also, diesel engine oil comes with a higher viscosity to increase your engine’s overall condition.

Synthetic Diesel Oil

Synthetic Diesel oil is especially one type of manufactured diesel oil, and it consists of synthesized base oils mixed with additives. To molecularly scrub away, it can take out debris with detergents. That’s why; you can get a clean and skilled engine.

Depending on your vehicle engine, you should choose synthetic blends or fully synthetic type diesel engine oil. Most companies follow the property formula of Royal Purple and Valvoline, which add the benefits of synthetic diesel oils in pure nature. Usually, this formula of oil has no crude oil, so it tends to have less debris and results in slower wear. Depending on your recommended oil type you select rotella diesel oil also.

15W40 Synthetic Diesel Oil

15W40 synthetic diesel motor oil comes with complete triple protection plus technology, produced with fully synthetic base oils. Accordingly, its advanced additives can protect your engine from deposits, oil breakdown, and wear.

Additionally, without compromising stability, it offers incredible low-temperature flow and enhanced fuel economy compared to traditional SAE 15W-40 oils. In particular, this synthetic motor oil is suitable for older and modern heavy-duty diesel engines.

From many of the world’s number engine makers, it gets a broad range of approvals. Regardless, if you have general haul, on-highway fleets, construction, public transport operators, and diesel pickup trucks, you can pick this oil.

Traditional Oil:

Before, diesel oils were produced traditionally. That means this process relied on natural elements. Mainly, diesel motor oil source is crude oil. Because of its natural ingredients, this fluid contains less molecular viscosity. Moreover, due to its lower ability, the diesel industry is moving away from using this traditional or Mineral oil. But Still, mineral types of diesel oil especially low ash diesel engine oils are popular in a region of the world.

Hybrid Formula Oil:

Hybrid diesel motor oil is a complete synthetic formula, and it is the most common oil. Generally, this type of oil contains conventional and artificial elements. So, if you use this oil, you can get both oils’ benefits. These types of oil are also known as Synthetic blends or semi-synthetic.

They are more reasonable for the source, and they come with double the cost because of artificial chemicals. Consequently, this process can optimize fuel economy if you properly blend it. Nonetheless, these types of oil are best used in colder climates.

The Best Diesel Motor Oil Reviews Of 2023

best diesel engine oil

Below we will describe some of the best diesel motor oil for your diesel vehicles. Ergo, you can choose the best one for your diesel motor from here.

1. Mobil Diesel engine Oil

Mobil has a versatile diesel engine oil range including Traditional & synthetic types. Mobil diesel engine oils are popular for their long-lasting performance & varieties of customized parameters like the Viscosity Index & TBN. So you can choose according to your requirements from a wide range of mobile diesel engine oils. Let’s discuss this in detail:

Mobil Delvac: Delvac is a very popular diesel engine series oil of ExxonMobil company. The Popular Delvac Synthetic Diesel Oils are: Delvac 1 5W-40, Delvac 1 ESP 5W-40.

Except for the Synthetic Oil, Mobil Delvac is also very popular for its traditional diesel engine oil Delvac MX 15W-40.

On the other hand, the Delvac series also has 20W-50 & 10W-30 diesel oils which are perfect for multipurpose Gasoline engines.

Mobil has also some other popular diesel engine oils like Mobil 1 Turbo and Mobil 1 ESP, these oils have versatile Grades for Diesel trucks and other heavy-loaded diesel engines.

2. Shell Diesel Engine Oil:

Shell Diesel brand all engine oil is basically based on high-performance Group II base oils, and it’s one of the most developed 15w-40 oil technologies. Notably, it’s available on the market and suitable for all vehicles. That means this oil is perfectly versatile to benefit from single oil and is ideal for all types of engines, ages, and automobiles.

Usually, Shell diesel motor oil comes with low levels of sulfur to help maintain the technologies of future vehicle efficiency. That’s why; if this oil is perfect for your diesel engine, you can choose this oil without any hesitation.

Rotella Diesel Oil:

Shell Rotella Diesel engine oil offers huge wear protection for heavy-duty diesel engines like pickup trucks and tractors. In Particular, it has advanced additive technology for extra engine cleanliness throughout the oil drain intervals.

Undoubtedly, Rotella Oil can protect the engine from any harsh situations found in low-emission, modern, and hardworking diesel engines. Surprisingly, it provides deposit control to keep your engine clean for long life and optimum performance.

Therefore, effectively it maintains the stability of emissions control systems where after-treatment systems are utilized. Furthermore, this oil developed protection against consistency loss compared to the previous formulation. In addition, Rotella will be an excellent choice for those who have multiple public transport and high-power vehicles. Specially Rotella updated oil like T5 or T6 is a super performer oil with longer drain intervals for your diesel engine.

Rimula Diesel Oil:

Shell Rimula Series is also popular as diesel engine oil. This oil has a super performance in heavy-duty bus & truck diesel engines. Shell Rimula 15W-40 & Rimula Extra 20W-50 oils are very commonly used mineral diesel engine oils in the world and have also very much competitive prices compared to Rotella or other superior type diesel engine oils.

See Also: Mobil Vs. Shell Engine Oil

3. Castrol Diesel Engine Oil:

Eventually, this oil comes to provide a high level of diesel motor preservation throughout service intervals. And because of this formula, you can lower maintenance costs and downtime.

By using the best diesel engine oil, you can make sure your retail vehicles and components will arrive safely. Yet, after using the best oil in your cars, your engine can carry any load and challenging environment.

4. Valvoline Diesel Oil:

Valvoline Premium diesel engine oil provides outstanding protection for heavy-duty trucks and equipment. Still, this engine oil is recommended and approved by Cummins.

The proprietary One solution technology diesel oil comes for hard-working diesel, natural gas, and gas engines in both off and on-road highway applications.

Therefore, its features are extraordinary oxidation friction, excellent wear protection, and improved deposit performance compared to business requirements.

Improved synthetic base stocks offer faster and safer begins when the weather is freezing. On the contrary, it gives enhanced thermal properties during hot weather operations. Its extra friction supports can improve the heavy-duty engine’s life.

5. Motorcraft Diesel Oil

Motorcraft 10w-30 Super Duty Diesel Motor Oil

Motorcraft 10W-30 Super Duty Diesel Motor Oil is a high-quality diesel engine oil recommended by Ford Motor Company. 

Particularly, you can use this oil in Ford vehicles equipped with Power Stroke Diesel engines. Besides this, it’s suitable for other diesel engine applications where the manufacturer suggests this viscosity grade and quality oil.

This Diesel oil is formulated with premium hydro-processed base oils and special additive technology. So, you can use this oil in your car perfectly.

Also, it can satisfy the warranty requirements of Ford Motor Company and other import and domestic engine manufacturers. Even so, it can fulfill the importance of Cummins CES 20086, Volvo VDS-4.5, and API Service CK-4. Usually, it provides developed oxidation protection and has 1,000 ppm phosphorus to increase wear protection.

best oil for older diesel engines

Motorcraft SAE 5w 40 Full Synthetic Diesel Motor Oil

Motorcraft 5W-40 is a high-performance heavy-duty and light-duty full synthetic diesel engine oil. Specifically, you can use this oil in Ford cars equipped with Power Stroke engines such as buses, trucks, and construction applications.

It meets API Service Section CJ-4, which requires 2007 on-highway exhaust emission standards for use in ultra-low sulfur diesel fuel.  Don’t use this oil on gasoline engines equipped with catalysts.

SAE 5W-40 fully synthetic diesel oil is suitable for use in older engines where the manufacturer suggests API section CD, CI-4, CF-4, CI-4 Plus, and CJ-4.

Furthermore, you can use this oil in all North American Ford diesel engines over a broad temperature from -20° F (-29° C) to 100° F (38° C) range. Well, we hope this is the best diesel motor oil for your car we have seen.

Frequently Asked Questions (FAQ):

Q. Can I use diesel motor oil in a gasoline engine?

Yes, you can use it when your diesel oil fulfills the proper specifications and density requirements.

Q. How to turn used motor oil into diesel fuel?

Firstly, you should pump your waste motor oil into converted used motor oil in a diesel fuel plant. Secondly, heat the crude oil, and after heating it, you can get the best diesel quality; you should keep this oil at a superior temperature.

When you heat the fuel oil, it will convert the diesel oil gas. Then the cooling system can cool this diesel oil gas into the diesel. In this way, after converting used motor oil into diesel fuel, you can use it on any diesel-burning generator or vehicle. This way is becoming more famous day by day. At last, in this way, you can process used motor oil.

Q. What oil do you use in a diesel engine?

Naturally, diesel oil requires synthetic oil or high-viscosity oil. But most of diesel motors will suggest 15W-40 or 20W50 because it’s thicker and heavier.

Q. What is the best oil to use in a diesel engine?

Synthetic oil is the best for your diesel engine. The reason is that this oil only comes to tolerate the higher temperatures and situations.

Besides this, if you want to know the famous brand, then read below.

  • Shell Rotella T4 15W-40
  • Valvoline Premium Blue 15W-40
  • Shell Rotella T6 Heavy-Duty Diesel oil
  • Liqui Moly Diesel High Tech Synthetic motor oil
  • Schaeffer SynSheild Synthetic plus diesel motor oil
  • Motorcraft 10w-30 super duty diesel motor oil

Q. Is 15W40 oil good for diesel engines?

You can use 15W-40 diesel oil successfully in off-highway diesel components, gasoline and diesel engine, over-the-road diesel trucks, and more.

Q. What oil is best for older diesel engines?

Older diesel engines generally recommend CI-4 or Older APIs like CH-4 or CF-4, which are also covered by API CI-4. And if engine life is too high you can use 20W50 in replace of 15W-40. As high viscosity or thick oil performs better in Older engines.

You May Read: Diesel Oil in Gas Engine

Final Word:

Finally, when it comes to selecting the best diesel motor oil, you should keep in mind a few things. First, you should consider the oil weight. Heavier oil can protect your engine from wear and tear, and lighter oils can provide superior fuel economy. Second, before selecting diesel oil, you need to keep in mind about climate. In cold weather, if you use thickened oil, it can be the reason for engine problems.

Conversely, in hot weather, you need to choose an oil that won’t break down. In conclusion, here we were given some famous diesel oil brands, we hope after reading our full article you can choose the right one for you. Always be careful before selecting diesel motor oil. And, if you need any help, please leave questions; our expert is always ready to answer.

Important for You:

10W30 Vs 15W40 Diesel Oil

Delo Vs Rotella Vs Delvac


I am Engr. Z Eusuf Lubricant Specialist, Mechanical Engineer & has been working with engine lubricants for a long time and knows what makes them work best. I can help you find the right oil for your needs, and I have tips on how to keep your engine running at its best.