Delo Vs Rotella Vs Delvac | A Practical Comparison for You

Delo, Rotella, and Delvac are different types of diesel motor oil that work for almost similar purposes. When you think about buying a new car, you have to know about the oiling system. The Delo Vs Rotella Vs Delvac debate allows you to get a clear concept and finally consider the right one for your vehicle.

These three oils have visible differences, which you discover from their viscosity, additives, and so on. You should consider the right oil from these three oil systems based on your area’s weather, car condition, and needs.

What Is Delo Oil?

Example of 15w40 Delo heavy duty engine oil

Delo is a series of mono and multi-grade Chevron product for mixed-fleet motor oils. It is recommended for older four-stroke diesel engines. But you may use it for gasoline engines also as it meets the API requirement CF-4/CI-4 /SJ. This oil is formulated so that users can use it for older engines and increase their lifespan. On the other hand, you will also use this oil for both low and high sulfur. Though Delo is popular for heavy-duty diesel and marine engines though it has gear oil and coolant also.

What Is Rotella Oil?

Example of the Rotella T4 Oil (viscosity grade 15w40) full synthetic heavy duty engine oil

Rotella oil is a line of heavy-duty diesel engine lubrication products of Shell. The line included mineral & synthetic types and different viscosities. The oils come under categories such as C and S. These are named by API (American Petroleum Institute).

What Is Delvac Oil?

Example of the Mobil Delvac 1300 Super diesel engine oil in 15w40

Delvac is a wide range of diesel-based motor oils of the Mobil brand. The primary purpose of this oil is increased engine health so that users run the engine for a long-time. This oil meets the original equipment manufacturer (OEM). These elements deliver high performance in both on and off-highway applications. Besides multigrade diesel engine oils, Delac also has solutions for vehicle transmission & greasing solution.

What Are the Differences between Delo Vs Rotella Vs Delvac Oils?

These three oils are different from each other. For example, they have viscosity, performance, and other differences.

Delo Vs Rotella Vs Delvac


First of all, Delo oil viscosity is suitable for cold weather startup and operation. Moreover, Rotella oil comes with the fastest-growing viscosity grade for diesel engines. It is ready to protect the engine against wear and rust problems and as it has wide viscosity ranges like 15w-40,5w-40 or 10w40 so it can work against different temperature barriers. In that case, you have to select the right grade. And finally, Delvac oil viscosity is truly far better for low-temperature engines.

Types of Oils

Delo is a high-performance marine-type engine oil. It is also known as a medium-alkaline diesel engine oil. On the other hand, Rotella T5 & T6 are synthetic type oil that combines base blend though Rotella t4 is the conventional type of diesel engine oil. Similarly, Delvac oil is also a high-performance synthetic oil that provides excellent lubricant and long drain capability though it has mineral grade also.

A Comparison Chart of Delo, Rotella, and Delvac

Generally, Delo oil viscosity is designed for cold weatherRotella used the fastest-growing viscosity.Delvac oil viscosity is good enough for low temperatures.
Delo oil is suitable for marine engines. It has both mono &
multi grades for diesel engines.
Rotella is a series of multigrade premium-based minerals &
synthetic oils for diesel engines.
It provides excellent multigrade
lubrication and long-drain performance for diesel engines
Popular diesel engine oil of
Chevron lubricants. But Delo
has also Coolant and gear lubrication oils.
Premium Diesel engine oil of Shell Oil.The Delvac series is top-rated as
diesel engine oil of ExxonMobil.
Though Delavc 1 & some other
grades are also used as
transmission and grease also.

Check: ExxonMobil Vs Chevron Vs Shell

Mobil Delvac 15w40 Vs Rotella 15W40

Mobil Delvac 15w40 is an extra high-performance diesel oil that provides the engine with the excellent lubricants of today. It used high viscosity and progressive additive systems to provide superior performance.

On the other hand, Rotella 15W40 is ready to provide deposit control. This controlling benefit keeps engines clean for optimum performance and also makes the engine longer life.

Unlike the above Mobil Delvac 15W40, Rotella 15W40 is ready to provide excellent performance to protect the engine from wear, corrosion, and rust.

Based on your need, you can consider any of them. Rotella 15W40 is much better than Mobil Delvac 15W40 because of its ingredients and high performance.

FAQs (Frequently Ask Questions)

Q: Is Rotella or Delo better?

Answer: Delo is far better than Rotella if we talk about heavy-duty diesel engines. Delo Silver is ready to run 2 or 3 times longer than Rotella for marine engines. On the other hand, Rotella gives superior performance and a smooth running experience for the latest vehicle engines and cold temperatures.

Q: Is Mobil Delvac a good diesel oil?

Answer: Mobil Delvac is extra high-performance diesel oil. It provides excellent lubricants on the engine for long-time uses. Mobil Delvac also meets with high-standard features. Overall, this oil is truly good enough for diesel engines.

Q: Is Rotella oil better?

Answer: Compared to other 5W-40 formulas, Rotella oil is ready to provide 36% better wear protection. The low-viscosity synthetic oil allows your vehicle engine to improve economy, durability, and performance.

Wrapping Up!

Delo, Rotella, and Delvac all are suitable for diesel engines. If you are a car owner, you may understand the importance of choosing the right types of oil. Furthermore, based on the weather conditions, engine protection, and make engine’s long life, these three oils worked much better. Though they have lots of differences, their goals, and operating systems are similar.


Emon is Lubricants specialist who studied on Petroleum Engineering in UAE. He have more than 10 years experience on different kinds of lubrication including automobile troubleshooting.