8 Best Synthetic Oil for Diesel Engines [current_date format=’Y’]

Diesel engines are high quality and require oil to maintain their performance. You should choose the right oil to protect your engine from potential problems. To save you time searching for suitable products on the market, I have compiled a comprehensive list of Best Synthetic Oil For Diesel Engine You will be able to make an informed decision based on their pros and cons. 

8 Reviewed the Best Synthetic Oil For Diesel Engines

Shell Rotella T4 Triple Protection Conventional 15W-40 Diesel Engine Oil

Shell Rotella T4 Triple Protection Conventional 15W-40 Diesel Engine Oil

Key Details:

  • Manufacturer: Shell Rotella T
  • Style: Heavy Duty Engine Oil
  • Viscosity: 15W-40
  • Liquid Ounces: 128 Fluid Ounces

Shell Rotella also developed the Shell Rotella T4 Triple Protection Conventional Motor Oil. The product is manufactured by the same company, but it lacks many of its benefits. It is nevertheless a good product at a reasonable price for diesel engines.

Extended drain intervals are available for this product, which is superior to conventional motor oils. It improves vehicle performance, and the owner enjoys a more comfortable driving experience. It is a great economical choice because of its low price.

It improves engine viscosity stability. It increases the engine’s strength and helps prevent oil/viscosity loss. It provides triple protection against wear, deposits, and oil sludge as well as motor oil degradations.

It is essential to keep in mind that this product is still conventional motor oil. It is therefore easily outclassed in all other products on this list because it offers fewer benefits, has shorter drain intervals and needs to be changed more often.   

It meets the API CJ-4 and CK-4 requirements. CH-4 requirements.


Pros
  • Greater stability with viscosity
  • Performance improvements
  • Longer drain intervals
  • Wear protection that is better
Cons
  • Not full synthetic

Mobil 1 Super 96819 15W-40 Delvac

Mobil 1 Super 96819 15W-40 Delvac

Key Details:

  • Mobil 1 is the manufacturer
  • Delvac 1300 style
  • Viscosity: 15W-40
  • Liquid Ounces: 128 Fluid Ounces

Mobil Super Delvac Motor oil ranks first on our list. This oil is ideal for diesel-based engines. Mobil 1 has manufactured the product to meet the requirements of modern diesel engines. 

This product significantly improves the vehicle’s overall performance. It significantly reduces oil consumption and saves money. It has outstanding additives that decrease the engine’s overall wear.

It works well under both high and low temperatures. The product provides thicker lubrication for the engine’s parts, making it more resistant to high temperatures. They are protected from overheating and damage by the constant stress they experience.

It is affordable, making it affordable for all customers. It has better packing which prevents leaks. There are frequent reports of injector failures, which can lead to vehicle damage. 

It meets all OEM requirements and performs extremely well in all weather conditions.


Pros
  • Excellent performance in cold temperatures
  • Packaging improvements
  • Reduce your oil consumption
  • Affordable product
Cons
  • Injector failure may occur
4

Castrol 5W-30 C3 Castrol EDGE Full Synthetic Motor oil

Castrol EDGE 5W-30 C3 Advanced Full Synthetic Motor Oil

Key Details:

  • Castrol is the manufacturer
  • Style: Advanced Synthetic Full Synthetic
  • Viscosity: 5W-30
  • Liquid Ounces: 160 Fluid Ounces

Next on our list is Castrol Edge Advanced Full Synthetic Motor Oil. Castrol developed it to give you a superior performance in whatever vehicle you use it for. It also contains detergents to help with common problems.

This product was specifically designed to increase the strength of your engine. It increases the oil film strength of the engine by 30%. This provides greater stability and avoids the common problem of oil/viscosity breaking down.

The product reduces the presence of sludge or deposits in the engine. This can lead to serious health problems if it is not addressed promptly. It improves the vehicle’s performance and allows for a more comfortable driving experience. It offers up to 10x higher performance in high temperatures.

This oil also significantly improves vehicle fuel economy, which is always a plus. However, the oil burns much faster than other products on this list. This can cause serious problems for the owner, and increase the overall cost. 

It meets the API SN and CF requirements as well as ACEA C3 requirements. It provides outstanding performance in all terrains.


Pros
  • Enhances engine performance
  • Reducing friction
  • Increased strength
  • Improves fuel economy
Cons
  • Oil burning increases

Valvoline Premium Blue Extreme SAE 5W-40 Synthetic Engine Oil

Valvoline Premium Blue Extreme SAE 5W-40 Full Synthetic Engine Oil

Key Details:

  • Manufacturer: Valvoline
  • Style: Platinum Blue Extreme Full-Synthetic
  • Viscosity: 5W-40
  • Liquid Ounces: 1 Gallon

Another excellent Valvoline product is the Valvoline Premium blue Extreme full synthetic oil. This product will give your car an overall better performance. It is compatible with most modern engines, so you can have a more enjoyable driving experience.

This product provides excellent protection against the wear problem that is so common in modern engines because of the high pressure they are subject to. It improves engine cleanliness by reducing the amount of sludge, deposits and other contaminants.

The product performs better in cold conditions. Despite being a winter grade product, it is resistant to poor start-up and LSPI. It improves the protection of engine parts susceptible to damage when heated.

This product is also more resistant to corrosion. One of the main concerns about the product is the poor quality container. It is susceptible to leaks and is therefore prone for damage. This can lead to higher costs for the owner.

It is approved and recommended by Cummins and meets API CK-4 and CJ-4 requirements.


Pros
  • Enhances fuel economy
  • Performance under cold temperatures:
  • Wear protection that is greater
  • Corrosion protection improved
Cons
  • Poor container quality

Royal Purple 15W40

Royal Purple 15W 40

Key Details:

  • Manufacturer: Royal Purple
  • Style: Duratec Super Diesel Oil
  • Viscosity: 15W-40
  • Liquid Ounces: 1 Gallon

Next on our wish list is the Royal Purple Super Diesel motor oil. It was developed by Royal Purple, as the name implies. It provides outstanding performance for most diesel engines, and helps to reduce any pre-existing problems.

This product significantly improves engine protection against corrosion. Corrosion can cause engine damage and poor performance. It also reduces engine wear. It improves the engine cleanliness. 

It performs well in both cold and hot temperatures. The product can withstand cold temperatures without causing LSPI. Protect the engine from heat stress and excessive heat.

This extends the drain intervals which is always a good thing. It has a few problems. The product’s pricing is much higher than other vehicles on the market.

It conforms to the API service CI-4 or CI-4 PLUS, CJ-4 or CK-4 requirements.


Pros
  • Corrosion protection improved
  • Extended drain intervals
  • Greater engine cleanliness
  • Great protection against cold temperatures
Cons
  • Costly product

Shell Rotella T4 15W 40

Shell Rotella T4 15W 40

Key Details:

  • Manufacturer: Shell Rotella T
  • Style: Full Synthetic
  • Viscosity: 5W-40
  • Liquid Ounces: 128 Fluid Ounces

Shell Rotella T6 Full synthetic motor oil is one of the best options for diesel-based engines. Shell Rotella has created the product with precision in order to give your vehicle an overall better performance. This product greatly increases the vehicle’s fuel economy.

This product is full-synthetic motor oil. It provides better performance than both conventional and synthetic blend motor oils. It helps reduce the accumulation of sludge in the engine and improves its cleanliness.

This product is better at preventing heat damage. The product also prevents engine damage from permanent heat, which can result from the extreme heat and stress that the engine must endure. It has longer drain intervals and requires less oil changes than other engines.

It uses a low-ash formulation that lowers the level of exhaust poisoning. One problem with this product is the fact that it is made of average material. This makes oil leaks and spills very common.  

It is an excellent product that meets API SERVICE CK-4 and CI-4 PLUS requirements. 


Pros
  • Greater heat resistance
  • Improves fuel economy
  • Wear protection that is better
  • Reducing sludge deposits
Cons
  • Common oil leaks

Pennzoil Platinum Full Synthetic Engine Oil 5W-30

Pennzoil Platinum Full Synthetic Motor Oil 5W-30

Key Details:

  • Manufacturer: Pennzoil
  • Style: Platinum Full Synthetic
  • Viscosity: 5W-30
  • Liquid Ounces: 160 Fluid Ounces

Our next product is the Pennzoil Platinum Full-Synthetic Motor Oil. The product was manufactured by Pennzoil, as the name suggests. It was specifically designed to work with most diesel engines. It improves vehicle performance and solves any issues.

The product is not made from other motor oils. It is made of natural gas instead of oil. Pennzoil’s patent-pending Pure Plus gas-to liquid technology is responsible for this. This allows for cleaner engines with fewer impurities and deposits, resulting in high-quality motor oils.

This product is very resistant to wear. The problem can cause a decrease in vehicle performance or even permanent damage to the engine if it isn’t treated promptly. This product contains excellent detergents which thoroughly clean all engine parts, including the piston.

It increases the vehicle’s fuel efficiency. This product is also more resistant to corrosion. The container seal is made from poor material which can lead to leakage. 

It is compliant with the ILSAC GF-6A and API SP requirements, ACEA B5, B5, A1, A1 and is certified by American Petroleum Institute.


Pros
  • Corrosion is reduced
  • Protect horsepower
  • Wear protection that is greater
  • Cleans pistons
Cons
  • Poor seal quality

Castrol EDGE 03087 5W-30

Castrol EDGE 03087 5W-30

Key Details:

  • Castrol is the manufacturer
  • Style: Full Synthetic Advanced Style
  • Viscosity: 5W-30
  • Liquid Ounces: 160 Fluid Ounces

Castrol Edge Extended Performance Advanced Synthetic Full Synthetic Motor oil is the last item on our list. Castrol also manufactured this product and it is an excellent choice to use with modern diesel engines. This product has many benefits and is a great choice.

It is highly resistant to oil/viscosity break down. The product contains more strength and stability additives. It is also better at protecting against wear that can affect the performance of your vehicle.

It offers up to 10x higher performance in high temperatures. It helps to prevent the problem of LSPI in cold temperatures and protects the engine from heat-related damage. Mobil 1 Extended performance has 3x the strength of this product against viscosity break down.

This product is very affordable for the many benefits it offers. The one problem is that the oil burns faster than the advanced full synthetic oils we have listed. This can cause costly replacements.

It is compliant with the API SN, API GF-5, ACEA B1, and ACEA A1 requirements.  


Pros
  • Affordable product
  • More resistance to breakdown
  • Excellent engine strength
  • Performance at lower temperatures
Cons
  • Oil burning faster

Oil Buying Guide for Diesel Engine

The Viscosity

Prior to making a purchase, one must know the viscosity. Thinner oils can be used in colder environments because they are more fluid and have a lower chance of slipping into poor start-ups.

Thicker oils, on the other hand, are better for warmer temperatures as they protect the engine against damage from extreme stress. It is done by creating thicker oils around the essential parts. For the best performance of diesel engines, oil should be 15W-40 or 5W-40 viscosity.

Types of Oil

Next, you need to be aware of the oil type. There are three main types of oil available: full synthetic, synthetic blend and conventional. The conventional oils offer a standard vehicle’s performance at a low cost.

While synthetic motor oils are more expensive than regular oils, they offer a lot more benefits for your vehicle than the former. This is the last oil that is 100% synthetic. They provide the best performance and a variety of benefits for your vehicle. They are also the most costly of the three.

Because they are more efficient, diesel engines prefer full synthetic motor oils over conventional oils.

Extra Features

If you are still unsure about what product you should purchase, you might consider the additional benefits. If your vehicle is experiencing poor engine start-up, choosing a product that addresses that issue will be the best choice. 

Most Frequently Asked Questions

What is the recommended viscosity of diesel engines?

Diesel engines recommend using products with a viscosity of 5W-40 or 15W-40, depending upon the temperature.

What is the average oil capacity of diesel engines?

This answer depends on varies from vehicle to vehicle. For example, a ford f-250 diesel engine can hold up to 15 quarts of oil.

Which is the best brand of motor oil for diesel engines?

Castrol, Shell, Pennzoil, and Royal Purple are good options for diesel engines.

What type of oil do diesel engines require?

Diesel engines require either fully synthetic or synthetic blend motor oils.

How long should I wait before changing oils in my diesel engine?

It is recommended to change oils every 7,500 – 10,000 miles when using full synthetic oil. On the other hand, while using a synthetic blend motor oil, oil changes should be made every 5,000 miles.

The Viscosity

Diesel engines require fully synthetic or synthetic-mix motor oils that have a viscosity between 5W-30 and 45W-40. The Shell Rotella T6 Full Synthetic 5W-40 Diesel Engine Oil This is possibly the best. Best Synthetic Diesel Oil The market offers many choices. If you’re looking for something more affordable, the Castrol Edge 5W-30 It would be a good idea.

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