When you shop through links on our site, we may earn an affiliate commission. This educational content is not intended to be a substitute for professional advice.

Best Synthetic Engine Oil For Diesel Engines (2024 Updated)

If you’re looking for an efficient and cost-effective way of keeping your diesel engine running smoothly, then synthetic engine oil is the solution you’ve been searching for. Unlike conventional oils, synthetic engine oils are blended with chemical compounds that can enhance the lubrication capability of the oil, reduce engine wear and tear, and help to keep the engine clean.

While synthetic oil offers several benefits, there are some factors that you should consider before choosing it for your diesel engine. For example, you should first check your vehicle’s manual to ensure that synthetic oil is compatible with your engine. You should also determine your vehicle’s oil viscosity requirement to ensure that the oil can work effectively in regulating oil pressure and temperature in the engine.

Do you want to increase the life span of your diesel engine? Or maybe you want to improve your vehicle's fuel economy and power? Are you looking for the most suitable engine oil for heavy-duty use on your truck or bus? These are some of the questions you may have in mind before making a decision on the type of engine oil to use. Whatever your engine’s lubrication needs, synthetic engine oil for diesel engines is the perfect solution that can help you maintain optimal engine performance and protection.

10 Best Synthetic Engine Oil For Diesel Engines

# Product Image Product Name Product Notes Check Price
1
This engine oil is ideal for diesel engines that require a 15W-40 synthetic blend with enhanced protection and performance.
2
It is ideal for diesel engines requiring 15W-40 oil and provides durability advantages.
3
This product is ideal for diesel engines that require SAE 5W-40 full synthetic engine oil.
4
This product is ideal for use in diesel engines, providing full synthetic protection and improved fuel economy.
5
This product is ideal for use in diesel engines that require 10W30 CK-4 synthetic engine oil.
6
This product is ideal for use in diesel engines requiring full synthetic 15W40 oil and comes in a bulk packaging.
7
The product is ideal for diesel engines and offers full synthetic protection in a tote size of 275 gallons.
8
Ideal for diesel motors that require CK-4 API classification, providing full synthetic protection and exceptional engine performance.
9
Schaeffer Manufacturing Co. provides high-quality lubricants and specialty products for use in various industries.
10
It is ideal for use as a full synthetic engine oil with a viscosity grade of 5W-40.
This engine oil is ideal for diesel engines that require a 15W-40 synthetic blend with enhanced protection and performance.
It is ideal for diesel engines requiring 15W-40 oil and provides durability advantages.
This product is ideal for diesel engines that require SAE 5W-40 full synthetic engine oil.
This product is ideal for use in diesel engines, providing full synthetic protection and improved fuel economy.
This product is ideal for use in diesel engines that require 10W30 CK-4 synthetic engine oil.
This product is ideal for use in diesel engines requiring full synthetic 15W40 oil and comes in a bulk packaging.
The product is ideal for diesel engines and offers full synthetic protection in a tote size of 275 gallons.
Ideal for diesel motors that require CK-4 API classification, providing full synthetic protection and exceptional engine performance.
Schaeffer Manufacturing Co. provides high-quality lubricants and specialty products for use in various industries.
It is ideal for use as a full synthetic engine oil with a viscosity grade of 5W-40.

1. Shell Rotella T5 Synthetic Blend 15w-40 Diesel Engine Oil (1 Gallon, Case Of 3)

The Synthetic Blend 15W-40 Diesel Engine Oil with Triple Protection Plus technology is a high-quality oil that provides excellent protection to diesel engines. It is specially formulated to protect against wear, deposits, and oil breakdown. This oil is ideal for on-highway fleets, construction and agricultural machinery, and diesel pickup trucks including high-power vehicles that require resistance to heat and stress.

This oil improves low-temperature flow compared to conventional 15W-40 oils, which makes it an ideal choice for use in cold climates. It also helps control engine deposits for reliability at extended oil drain intervals, but it's essential to always follow the OEM recommended oil drain interval. The Triple Protection Plus technology in this oil controls engine wear 37 percent better than the maximum wear requirements in API CK-4 engine wear tests. Moreover, this oil has improved oxidation performance for increased resistance to oil breakdown under high temperatures compared to the previous formulation.

This Synthetic Blend 15W-40 Diesel Engine Oil comes in a case of three 1-gallon bottles with ergonomic design for easy handling and pouring. The oil is easy to use and store, making it a convenient option for those who need to change their oil regularly.

Pros

  • Protects against wear, deposits, and oil breakdown
  • Ideal for on-highway fleets, construction, and agricultural machinery, and diesel pickup trucks
  • Improves low-temperature flow compared to conventional 15W-40 oils
  • Controls engine wear 37 percent better than the maximum wear requirements in API CK-4 engine wear tests
  • Improved oxidation performance for increased resistance to oil breakdown under high temperatures compared to the previous formulation
  • Comes in a case of three 1-gallon bottles with ergonomic design for easy handling and pouring

2. Synshield Durability 15w-40 Diesel Oil (12×12)

This high-quality engine oil provides excellent protection for your vehicle's engine during severe operating conditions. It is designed to withstand extreme temperatures and maintain its performance throughout its life, ensuring that your engine is always running smoothly.

The oil has strong oxidation and viscosity control, which means that it can resist breaking down under high stress conditions and maintain its viscosity even at high temperatures. This also results in less oil consumption, which can save you money in the long run.

In addition, the oil has superior contamination control, which helps to prevent the buildup of harmful deposits and soot in your engine. This is due to its powerful soot-busting and deposit-dispersing capabilities.

The oil is also friction modified with micron moly, which helps to reduce friction between engine parts and improve fuel efficiency. This results in a smoother and more responsive engine.

Overall, this engine oil is an excellent choice for those who want to ensure that their engine is protected and running smoothly, even under the most severe operating conditions.

Pros

  • Provides excellent wear protection during severe operating conditions
  • Strong oxidation and viscosity control
  • Less oil consumption
  • Superior contamination control with soot-busting and deposit-dispersing capabilities
  • Friction modified with micron moly to reduce friction and improve fuel efficiency

3. Valvoline Premium Blue Extreme Sae 5w-40 Full Synthetic Diesel Engine Oil 1 Ga, Case Of 3

The heavy-duty equipment requires excellent wear protection, and this oil provides exactly that, ensuring the critical internal moving parts remain safe. The higher quality synthetic base oils and special inhibitors help resist oxidation and fight deposits & sludge, making it a reliable choice for heavy-duty applications. The oil also protects the engine during cold start-ups while controlling soot, which is crucial for equipment that sits idle for extended periods. Moreover, it offers advanced fuel economy of up to 1.5% over 15W-40 conventional oils in on-highway operations. This oil has a unique feature of 5,000 miles oil drain extension in Cummins X15/X12 engines when the average is 7mpg or higher. Made in America, this oil is formulated to maximize the engine's life and improve its performance. Cummins exclusively endorses and recommends this oil, making it a trustworthy choice for heavy-duty equipment.

Pros

  • Excellent wear protection for critical internal moving parts
  • Resists oxidation and fights deposits & sludge
  • Protects during cold start-ups while controlling soot
  • Offers advanced fuel economy of up to 1.5% over 15W-40 conventional oils in on-highway operations
  • Unique 5,000 miles oil drain extension in Cummins X15/X12 engines when average is 7mpg or higher
  • Made in America and formulated to maximize the engine's life and improve its performance
  • Exclusively endorsed and recommended by Cummins

4. Shell Rotella T6 Full Synthetic 5w-40 Diesel Engine Oil (1-Gallon, Case Of 3)

The Full Synthetic 5W-40 Diesel Engine Oil with Triple Protection Plus technology is designed to provide a high level of engine protection, durability, and performance. It is ideal for a wide range of heavy-duty engines, from pickup trucks to semi rigs. This oil is formulated with multi-functional dispersant additives that offer exceptional wear protection, protecting against wear, deposits, and oil breakdown. The enhanced fuel economy capability of 1.5 percent is achieved without compromising engine protection or durability when compared to 15W-40 oils.

Additionally, this oil provides an increased shear stability for better viscosity control and optimal engine oil pressure. It also has better cold-cranking properties and low-temperature pumpability, allowing it to reach critical engine parts faster. The advanced low ash formulation helps protect the exhaust catalysts and particulate filters found on the latest low-emission vehicles.

The Full Synthetic 5W-40 Diesel Engine Oil comes in a case of three 1-gallon bottles with an ergonomic design, making it easy to handle and pour. With this oil, you can enjoy exceptional wear protection for longer engine life, better fuel economy, and optimal engine performance in heavy-duty engine applications.

Pros

  • Provides exceptional wear protection for longer engine life
  • Offers enhanced fuel economy capability of 1.5 percent without compromising engine protection or durability
  • Formulated with multi-functional dispersant additives that offer an enhanced level of protection against the effects of soot, dirt, and other contaminants
  • Increased shear stability for better viscosity control and optimal engine oil pressure
  • Better cold-cranking properties and low-temperature pumpability for reaching critical engine parts faster
  • Advanced low ash formulation helps protect the exhaust catalysts and particulate filters found on the latest low-emission vehicles
  • Comes in a case of three 1-gallon bottles with an ergonomic design for easy handling and pouring

5. 10w30 Ck-4 Synthetic Diesel Engine Oil – 55 Gallon Drum

The Sinopec Diesel Engine Oil TULUX T700 Synthetic CK-4 is a high-quality product formulated with synthetic high viscosity index base oils and superior low SAPS additive packages. It is specially designed as the new generation of DEO to meet the strict emission standards, long life protection performance, fuel economy, and environmental standards. This product is suitable for use in high-speed, four-stroke heavy-duty low-emission diesel engines fitted with exhaust after-treatment systems designed to meet Euro V and Euro VI exhaust emissions standards. It comes in a 55-gallon drum (200L volume).

This diesel engine oil is certified by API CK-4, SN, ACEA E9 E7; DH-2 DH-2; Caterpillar ECF-3, ECF-2; Cummins CES 20081, CES 20086; Detroit Diesel DFS 93K222, DFS 93K218; Deutz DQC III-10 LA; Ford WSS M2C171-F1; JASO DH-2; Mack EOS-4.5, EO-O Premium Plus, EO-N; MAN 3575, MTU 2.1; Renault VI RLD-3, RLD-4; and Volvo VDS 4, VDS 4.5.

Pros

  • Formulated with synthetic high viscosity index base oils and superior low SAPS additive packages
  • Meets strict emission standards, long life protection performance, fuel economy, and environmental standards
  • Suitable for use in high-speed, four-stroke heavy-duty low-emission diesel engines fitted with exhaust after-treatment systems designed to meet Euro V and Euro VI exhaust emissions standards
  • Certified by various organizations

6. Full Synthetic Diesel Engine Oil – 15w40-5 Gallon Pail – Lot Of 36 Pails

Sinopec Diesel Engine Oil TULUX T700 Full Synthetic CK-4 is a high-quality diesel engine oil that is formulated using synthetic high viscosity index group 3 base oils and superior low SAPS additive packages. This product is designed to meet strict new emission, long life protection performance, fuel economy, and environmental standards. It is suitable for use in high-speed, four-stroke heavy duty low-emission diesel engines fitted with exhaust after-treatment systems designed to meet Euro V and Euro VI exhaust emissions standards.

This product comes in a 5-gallon pail (18L volume) and is certified by API CK-4, SN, ACEA E9 E7, Military Specification MIL-PRF2104K, ACEA E7-12, ACEA E9-12, Global Specification DHD-1, Caterpillar ECF-3, Cummins CES 20081, CES 20086, Detroit Diesel Power Guard Oil Specifications: DDC93K218 and DDC93K222, Deutz DQC III-10 LA, Ford WSS-M2C171-E, WSS-M2C171-F1, JASO DH-2, Mack EO-O Premium Plus, Mack EOS4.5, MAN 3275, MAN 3575, MB 228.31, MTU 2.1, Renault VI RLD-3, RLD-4 Navistar.

Pros

  • Formulated using synthetic high viscosity index group 3 base oils and superior low SAPS additive packages
  • Meets strict new emission, long life protection performance, fuel economy, and environmental standards
  • Suitable for use in high-speed, four-stroke heavy duty low-emission diesel engines fitted with exhaust after-treatment systems designed to meet Euro V and Euro VI exhaust emissions standards

Cons

  • – Does not ship to residential, home business or farm addresses

7. Full Synthetic Diesel Engine Oil – 15w40-275 Gallon Tote

The Sinopec Diesel Engine Oil TULUX T700 is a high-quality full synthetic CK-4 oil suitable for use in high-speed, heavy-duty, low-emission diesel engines with exhaust after-treatment systems designed to meet Euro V and Euro VI emission standards. It is formulated with synthetic high viscosity index group 3 base oils and superior low SAPS additive packages that meet strict new emission standards, provide long life protection, and improve fuel economy and environmental standards. This oil is an excellent alternative to other top brands including Mobil Delvac 1300 Super, Shell Rotella T6, Chevron Delo 400 SDE, Valvoline Premium Blue 8600 ES, and Castrol Vecton.

The Sinopec Diesel Engine Oil TULUX T700 is certified by API CK-4, SN, ACEA E9 E7, and meets Military Specification MIL-PRF2104K. It also meets ACEA E7-12, ACEA E9-12, Global Specification DHD-1, Caterpillar ECF-3, Cummins CES 20081, CES 20086, Detroit Diesel Power Guard Oil Specifications: DDC93K218 and DDC93K222, Deutz DQC III-10 LA, Ford WSS-M2C171-E, WSS-M2C171-F1, JASO DH-2, Mack EO-O Premium Plus, Mack EOS4.5, MAN 3275, MAN 3575, MB 228.31, MTU 2.1, Renault VI RLD-3, RLD-4, and Volvo VDS 4, VDS 4.5, Navistar.

This Sinopec Diesel Engine Oil TULUX T700 is packaged in a 275-gallon tote (1000L volume). Please note that this product does not ship to residential, home business, or farm addresses. Be sure to confirm shipping details prior to purchase.

Pros

  • Full synthetic CK-4 oil that meets strict new emission standards
  • Improves fuel economy and environmental standards
  • Provides long life protection
  • Certified by API CK-4, SN, and ACEA E9 E7
  • Meets a variety of specifications for top diesel engine brands

Cons

  • – Does not ship to residential, home business, or farm addresses

8. Milesyn Sxr 15w40 Api Ck-4 Full Synthetic Diesel Motor Oil 55 Gallon Drum

The Mack EO-O Premium Plus specification and API CK-4/SN specification are met by this product. It is designed to meet the performance requirements of most diesel engine manufacturers, including Caterpillar, Cummins, Detroit Diesel, Ford, Mack, Navistar, and Volvo. This product has superior anti-oxidation characteristics, ensuring that your engine is protected from harmful oxidation. The extended drain intervals of this product mean that you can go longer between oil changes, saving you time and money.

This product is specially formulated to provide superior protection for diesel engines. The Mack EO-O Premium Plus specification ensures that this product meets the rigorous standards set by Mack for their engines. The API CK-4/SN specification ensures that this product meets the latest industry standards for diesel engine oil. This product is suitable for use in a wide range of diesel engines, including those used in heavy-duty trucks, construction equipment, and other applications.

In addition to its excellent performance, this product is also easy to use. It is available in a range of container sizes, making it easy to find the right size for your needs. This product is also easy to pour and provides excellent protection against wear and tear. With its superior anti-oxidation characteristics and extended drain intervals, this product is an excellent choice for anyone looking for a high-quality diesel engine oil.

Overall, the Mack EO-O Premium Plus specification and API CK-4/SN specification are met by this product, making it an excellent choice for anyone who wants to protect their diesel engine from wear and tear. With its extended drain intervals and superior anti-oxidation characteristics, this product is a great investment for anyone who relies on their diesel engine for work or play.

Pros

  • Meets Mack EO-O Premium Plus specification and API CK-4/SN specification
  • Designed to meet performance requirements of most diesel engine manufacturers
  • Superior anti-oxidation characteristics
  • Extended drain intervals
  • Suitable for use in a wide range of diesel engines
  • Available in a range of container sizes
  • Easy to pour
  • Provides excellent protection against wear and tear

9. Schaeffer Manufacturing Co.

The engine oil comes in red packaging now, but it still contains the same high-quality formula as the previous black bottles. The oil is formulated to improve engine durability without affecting fuel economy. It's friction-modified with Micron Moly and Penetro to reduce friction, wear, and scuffing, ensuring a smoother and quieter engine operation. Moreover, this engine oil keeps the engine cleaner by minimizing sludge, soot, and carbon buildup. It also resists thinning at high temperatures, making it ideal for high-performance engines.

Pros

  • Improved engine durability without affecting fuel economy
  • Friction-modified with Micron Moly and Penetro to reduce wear, scuffing, and friction
  • Keeps the engine cleaner by reducing sludge, soot, and carbon buildup
  • Resists thinning at high temperatures, making it ideal for high-performance engines

10. Schaeffer Manufacturing Co. 9000-006s Supreme 9000 Full Synthetic Engine Oil 5w-40, 1 Gallon

This motor oil provides excellent protection for engines in cold weather. It is designed to improve engine durability without negatively impacting fuel economy. With its advanced formula, this motor oil helps keep engines clean by reducing sludge, soot, and carbon buildup. Its friction-modified Micron Moly and Penetro components work together to reduce friction, wear, and scuffing. This motor oil also resists thinning at high temperatures, making it a reliable choice for drivers in all types of weather conditions.

If you're looking for a motor oil that can handle harsh winter weather and improve engine performance, this product is an excellent choice. Its advanced formula provides superior protection against sludge and carbon buildup, while its friction modifiers reduce wear and scuffing. Plus, it resists thinning at high temperatures, making it a reliable choice for drivers in all types of weather conditions.

Pros

  • Provides strong cold weather startup protection
  • Improves engine durability without affecting fuel economy
  • Keeps engines cleaner with minimal sludge, soot, and carbon buildup
  • Friction modified with Micron Moly and Penetro to reduce friction, wear, and scuffing
  • Resists thinning at high temperatures

Best Synthetic Engine Oil For Diesel Engines FAQs

Are there any specific brands of synthetic engine oil that are recommended for diesel engines?

Yes, there are specific brands of synthetic engine oil that are recommended for diesel engines. One of the most popular brands is Mobil 1, which offers a range of synthetic engine oils designed specifically for diesel engines. Other recommended brands include Shell Rotella, Amsoil, and Royal Purple. These brands offer synthetic engine oils that provide superior protection and performance for diesel engines, which are known for their high compression and operating temperatures. Synthetic engine oils offer several advantages over conventional oils, including better viscosity control, improved wear protection, and increased resistance to thermal breakdown. Synthetic engine oils also offer longer service intervals, which can reduce maintenance costs and downtime for diesel engines. When selecting a synthetic engine oil for your diesel engine, it is important to consult your engine manufacturer's recommendations and choose a product that meets the required specifications and performance standards.

Can synthetic engine oil help to reduce engine wear and prolong the life of a diesel engine?

Yes, synthetic engine oil can help to reduce engine wear and prolong the life of a diesel engine. This is because synthetic oil is engineered to provide better protection and performance than conventional mineral oils. Synthetic oils have a uniform molecular structure that allows them to flow more smoothly and resist breakdown under high temperatures and pressure. This means that they can provide better lubrication for engine components, reducing friction and wear. In addition, synthetic oils contain fewer impurities and additives than conventional oils, which can help to prevent deposits from building up in the engine and clogging oil passages. This can help to improve engine performance and reduce the risk of engine failure. Overall, synthetic engine oil can be a good investment for diesel engine owners who are looking to maximize the lifespan and performance of their engines.

Can synthetic engine oil improve fuel efficiency in diesel engines?

Yes, synthetic engine oil can improve fuel efficiency in diesel engines. This is due to the fact that synthetic engine oil is designed to have a lower viscosity than conventional mineral oil. Lower viscosity means less resistance to the moving parts of the engine, resulting in less energy required to move the engine's components. This translates to improved fuel efficiency as the engine doesn't have to work as hard to operate.

Furthermore, synthetic engine oil is engineered to provide superior lubrication properties than mineral oil, ensuring that the engine components are better protected from wear and tear. This improved protection results in a longer lifespan for the engine and fewer emissions, which ultimately leads to better fuel efficiency.

It's important to note that not all synthetic engine oils are created equal, so it's essential to choose an oil that is specifically formulated for diesel engines. Additionally, it's crucial to follow the recommended oil change intervals specified by the engine manufacturer to get the best results for fuel efficiency and engine protection.

How often should synthetic engine oil be changed in a diesel engine?

The frequency of changing synthetic engine oil in a diesel engine depends on several factors, including the manufacturer's recommendations, the engine's age and condition, and the type of driving conditions. Generally, most diesel engine manufacturers recommend changing the synthetic engine oil every 5,000 to 7,500 miles or every six months, whichever comes first. However, some newer diesel engines may have longer recommended oil change intervals, up to 10,000 miles or even more.

It's important to note that diesel engines tend to be harder on oil than gasoline engines, due to their high compression ratio and increased heat and pressure. Therefore, it's crucial to use high-quality synthetic oil that can withstand these harsh conditions and provide excellent protection against wear, deposits, and oxidation. Regular oil changes are essential to maintain the engine's performance, fuel efficiency, and longevity.

In addition, it's recommended to follow a regular maintenance schedule that includes regular oil and filter changes, as well as other essential tasks like checking and topping off fluids, inspecting belts and hoses, and replacing worn or damaged parts. By following these guidelines, you can help ensure that your diesel engine runs smoothly and reliably for many miles to come.

What are the benefits of using synthetic engine oil in diesel engines?

Synthetic engine oil is a popular choice among diesel engine owners due to its numerous benefits. Firstly, synthetic oil has a longer lifespan compared to conventional oil, meaning that it requires less frequent oil changes. This not only saves money but also time and effort. Secondly, synthetic oil has better viscosity stability, which means it maintains its lubricating properties even at high temperatures. This is particularly beneficial for diesel engines, which operate at high temperatures and require superior lubrication to prevent wear and tear. Thirdly, synthetic oil has better resistance to oxidation, which prevents the formation of sludge and deposits that can clog the engine and reduce its performance. Lastly, synthetic oil provides better fuel economy as it reduces friction, which means the engine works more efficiently and consumes less fuel. Overall, using synthetic engine oil in diesel engines can extend their lifespan, improve their performance, and save money in the long run.

Leave a Comment