Updated at: 08-03-2022 - By: micdot

Diesel Engine Oil: Three Types to Know (For 2021)

A diesel-powered vehicle owner may be asking what sorts of oil they can use and which one is the best. As a general rule of thumb, we can divide it into three categories. If you insist on knowing:

Full synthetic, synthetic blend, and conventional diesel engine oils are all available. Because it is not derived from crude oil, 100% synthetic oil is devoid of any contaminants. When it comes to oil, conventional oil is mixed with a brand’s synthetic base oil.

What Are Types of Diesel Engine Oil?

All manufacturer brands of diesel engine oil make either of these three types. The viscosity, application, and additives are only a few of the variables that cause brands to diverge. In any case, all diesel engine oils on the market are classified into one of the following three categories:

Diesel Engine Oil That Is 100% Synthetic

diesel engine lubricant with synthetic blend

Diesel Engine Oil of the Conventional Sort

Engine oil is often referred to be a vehicle’s “blood.” With the best you can afford, you can expect years of seamless operation.

While it is possible to find the best oil, it is also possible to come across the more common varieties. Diesel engine oil quality varies widely, thus it’s imperative that drivers be aware of all options available. Without knowledge of the different types of oils available to choose from when purchasing an engine oil, you may end up with an oil that is not ideal for your vehicle.

Here, we’ll take a look at all the different types that are now available on the market. If you do this, you’ll be able to compare apples to apples and get the greatest value for your particular needs.

Let’s take a closer look at each of these categories and see which companies make the greatest products in each.

Full Synthetic Diesel Engine Oil

As I mentioned before, full synthetic diesel engine oil has a molecular structure that is complicated and unique.

Additives in this motor oil ensure maximum protection and performance. In contrast to normal motor oil, which contains contaminants, this product is free of them.

Anti-wear and cleaning compounds are combined in a unique way by the leading manufacturers. Your motor or engine will run at peak performance with all of these advantages.

For the most part, diesel-specific synthetic oils exist. The base oils for both gasoline and diesel engines are the same, but the additives are different because of their distinct qualities.

The following are 10 of the best full-synthetic diesel engine oils currently available on the market:

Synthetic Oil in the Color of Royal Purple

Rotella Synthetic Diesel Oil by Shell

Extended-Life Synthetic Motor Oil by Mobil 1

Full-Synthetic Pennzoil Platinum Motor Oil

Mobil 1 Synthetic High-Mileage Oil

It’s full synthetic oil from Castrol GTX Magnatec

Premium Liquid Moly Synthetic Oil

Full Synthetic Valvoline SynPower Oil by Valvoline

Extensively tested synthetic oil from Castrol Edge.

Synthetic Valvoline High Mileage Oil

Synthetic Blend Diesel Engine Oil

It is made from both conventional and synthetic base oils, depending on the manufacturer. The engine is better protected and the performance is enhanced as a result of the combination.

In addition to protecting modern diesel engines, this oil provides longer drain capability. Full synthetic oil may have a more enticing name, but conventional oil still outperforms it in terms of performance.

In general, if an oil contains a combination of conventional motor oils and synthetic base stocks, it can be considered a synthetic blend. You’ll benefit from improved performance and defenses thanks to the inclusion of synthetic base stock.

Overall, it performs better than a regular oil. In the current market, these five top synthetic blend diesel engine oils stand out:

Diesel Oil Delo Synblend Diesel Oil

It is recommended to use 15W-40 Shell Rotella Synthetic Blend Oil.

1300 Super 10W-30 synthetic blend oil by Mobil Delvac

An Ultra Synthetic Blend of Shell Rotella T5 10W-30

Mobil Delvac Super FE 10W-30

Both forms can be viewed as superior than the traditional type in general.

Full synthetic oils, on the other hand, are more commonly referred to as motor oil. Synthetic oil on the other hand, on the other hand, is a semi-refined oil.

All of these oils are blended together to create the synthetic blend. Synthetics have their advantages, but they also come with the impurities and different molecular sizes that come with conventionals.

In other words, choosing synthetic blends is a cost-benefit analysis. In between traditional and fully synthetic oils, it is a good option.

To finish, let’s look at the standard diesel engine oil in more detail.

Conventional Diesel Engine Oil

In this case, the lubricant is generated straight from crude oil and is used in diesel engines. At high temperatures, this lubricant has exceptional qualities that allow it to function effectively. In addition, it maintains its stability for extended periods of time.

Conventional oil, on the other hand, has fewer advantages, as previously noted. A synthetic blend or a synthetic product will yield superior outcomes.

For example, ordinary diesel engine oil does not provide the following benefits:

The lubrication has been improved.

Stability has been improved.

The number of breakdowns has decreased.

There are less deposits to deal with.

Conventional oils, on the other hand, are more cost-effective, but their performance is less than ideal.


In general, there are three types of diesel engine oil available on the market today. Full synthetic, synthetic hybrid, and conventional are all available.

Because of its superior performance and benefits, complete synthetic diesel engine oil commands a higher price than other types.

There is a mixing between synthetic base stock and conventional base stock in the synthetic blend. Because of this, it is also known as “semi-refined”.

For the most part, conventional oil is the most cost-effective choice. Unlike the first two, you will, however, reap less rewards.