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Best Oil Additive For Diesels

Featured image for "Best Oil Additive for Diesels" blog post. Yellow diesel truck.

The best oil additive for diesels should be a lubricant that can bring real benefits to the diesel owner. Some of the specific benefits that  best oil additives should provide to a diesel owner/operator are as follows: clean up unwanted and damaging deposits, slash diesel fuel consumption, maintain engine cleanliness, prolong oil drain intervals, specified for both diesel and gasoline engines, reduce engine noise and contain multiple anti-wear and friction-reducing additives. This type of diesel engine treatment will bring value and benefits to owner/operators.

Let’s delve into what a superior engine oil additive should be comprised of.

Characteristics of the Best Oil Additive for Diesels

First of all, most fleet and heavy equipment operations are considered mixed fleets. This means there are a combination of diesel and gasoline powered vehicles. To minimize confusion and simplify inventory, the best oil additive for diesels would be a lubricant that is formulated to work in both diesel and gasoline engines.It should be useful for both newer and older engines. Let’s focus on an engine oil additive for all vehicles.

Tractor harvester.
During harvest time, your engines are working hard and hot . Using a quality oil additive will strengthen your motor oil and help keep engines running cooler.









The first specification to consider is if the heavy duty oil stabilizer in question meets the API SL-CI-4 Plus specifications. The SL meets the gasoline specification and the CI-4 Plus meets the diesel specification. With such a designation, this oil supplement can be used for both diesel and gasoline engines.


Fortifying Your Engine Oil with Superior Additives

To be an oil additive that is useful to both gasoline and diesel engines, the chemistry needs to have high levels of zinc that, includes two types of superior quality zinc anti-wear protection. Diesel engines require a zinc compound that can provide the necessary protection and that is activated by the higher temperatures that these engines operate at. A zinc based motor treatment will improve the performance of your engine,  eliminates dry starts by creating a protective barrier on the metal surface of moving parts.

Conversely, gasoline engines require a different zinc compound that is activated at the lower temperatures that gasoline engines operate at. It goes without saying that the two unique zinc additive packages should be of the highest quality and at the minimum quantity of 0.14%.

John Deere engine
Add liquid moly to your engine oil and your tractor engine will experience less wear.







To be considered the best oil additive for diesels, another important component that is imperative would be liquid molybdenum. The specialized liquid molybdenum compound is unique in that it is completely soluble in oil. It does not settle out and cannot be filtered out. Moly compounds are one of the best  friction modifiers that can reduce wear by creating a tough yet slippery film of lubricant.

Moly offers superior friction and anti-wear reduction. During cold or dry start ups, it is quite useful in significantly reducing the unnecessary wear that typically occurs during these times. Also, moly offers outstanding extreme pressure protection. Additional benefits of using moly are engines run more efficiently, use less power and travel more miles per gallon,  thus contributing to enhanced fuel economy.

Tractor plowing a field.
Can your current oil handle the abuse it must deal with? Play it safe and add a superior oil additive to your maintenance program.








The next unique component that a premium synthetic engine treatment formulated for diesel engine oil and gas engines would contain is sub-micron teflon. This additive is extremely slippery and is helpful in reducing friction and wear. Sub-micron teflon helps in cold starts, dry starts  and is one of the most under rated friction modifier that reduces friction available on the market

Diesel tractor engine.
Prolong tractor engine life. Use an oil engine additive that contains zinc, moly, and teflon.








So far our synthetic oil additive is starting to materialize as one of the most unique and useful diesel engine oil additives. Combining the two different types of zinc, along with different types of oil additives such as teflon and moly, this triumvirate of additives for diesel engines and gas engines, provides a powerful ability to reduce heat, friction, and wear.

Keeping Your Engine Clean

The next area that this oil additive needs to perform in would be its ability in help maintain engine cleanliness. Most conventional motor oils lack the sufficient detergent dispersant chemistry to maintain engine cleanliness over a long period of time. Utilizing an oil additive with a robust detergent dispersant package would go a long way in boosting an inferior quality conventional diesel oil.

Yellow diesel tractor on the beach
Keeping your engine clean inside requires a robust detergent/dispersant package.








This boost will keep both diesel and gasoline engines running cleaner and more efficiently over a longer period of time. Also a longer oil change drain interval can be extended

An engine oil must have the ability to minimize the potential for oxidation and sludging. Modern engine designs now operate at much higher temperatures. Added to these high temperatures are EGR valve systems. The EGR system’s job is to recirculate exhaust gases, which expose engine oils to the potential of oxidation and sludging found in your engine.

If the EGR system is not functioning properly, then the circulation of the exhaust gases are not being handled, which will lead to engine oils degrading very quickly. The best oil additive for diesels should contain robust quantities of  rust inhibtors and oxidation inhibitors. These oxidation inhibitors help to protect engine oils from oxidation and sludging.

By keeping oxidation and sludging under control, the oil can be kept in service for longer periods of time. Again, adding such an oil additive to conventional motor oils will enhance its ability to now help in reducing oxidation and sludging.

Red tractor.
Older tractor engines can benefit from the best engine oil treatment.








Better Base Stocks = Longer Engine Life

The next critical area in manufacturing the best diesel engine oil treatment for diesel engine performance would be the choice of base stocks.

It is critical that the base stocks be highly refined by having them be severely hydrocracked and hydrofinished. Typically, conventional oils do not use these combinations of pure base stocks. Severe hydrocracking and hydrofinishing removes waxes and other byproducts. The combination of these two types of base oils vastly improves the oil’s ability to flow during cold temperatures.

Also, as the engine operates in extremely high temperatures, these two base oils impart outstanding oil film protection, keeping moving engine parts separated. Also, these highly refined base oils have naturally high viscosity indexes. They maintain their viscosity over a wide range of temperatures. They resist oxidation, thus drastically reducing oil consumption, leading to dollar savings.

Dump truck.
Use an engine oil additive made with the best base stocks to help reduce engine wear.








Having an oil additive that contains these two highly refined base oils helps to provide an oil that does not create unwanted varnish, sludge, and gum buildup on critical motor parts. Adding such an oil additive with these high quality base oils will help improve the performance of lower quality conventional oils.

Stopping Friction and Lowering Heat

The ability for an oil to provide a reduction in heat and friction would be extremely useful to the diesel owner/operator. Heat buildup is very detrimental to an engine’s service life. The heat is being generated from friction. The only way to combat friction is to use superior base oils along with the finest friction and anti-wear additives.

Utilizing zinc compounds, moly, and teflon will provide the engine with unmatched protection against friction and wear. If friction is reduced, heat and wear are also reduced.

There are a few scientific ways to test if an oil additive can in fact provide boundary lubrication and a reduction in wear and friction. The tests are the 4-Ball Wear Test, SRV Tester, and Falex pin and Vee Block test. By the way,  the oil additive with zinc, teflon, and moly discussed in this article has tested amazingly well in all of these tests.

Diesel engine system.
The best oil additive for diesels delivers engine cleanliness, less engine wear, and improved performance.






Neutralizing Corrosive Acids

The next area where a conventional engine oil is lacking is in its ability to neutralize corrosive acids. Corrosive acids find their way into engines during combustion, and if left un-neutralized, they can quickly damage not only the oil, but the engine as well. An engine oil’s ability to neutralize damaging acids is specified by TBN.

The higher the TBN number, the more effective the oil is in neutralizing against corrosive acids. Every day, conventional engine oils typically have a Total Base Number, when new, of around 7 to 8. The higher the number, the better an oil is at fighting acids.

For a product to be considered the best oil additive for diesels, the Total Base Number rating should be 15.

Utilizing an oil additive with a TBN of 15 will definitely enhance the ability of a  lower quality conventional oil to neutralize corrosive and deadly acid wear. By combating acid, a motor’s service life is greatly extended.

Semi truck diesel engine.
Conventional oils can’t handle acid, so using a 15 TBN oil additive will get the job done.

Meeting OEM Specs

To provide the absolute greatest amount of protection for both diesel and gasoline engines, it is extremely helpful that the carrier base oil, which contains all of the unique and specialized additives we’ve discussed, should meet and exceed many of the important OEM and industry standard specifications.

There are quite a few to consider and we’ll just touch upon some of the obvious ones that the oil should meet: MIL-L-46152E, Caterpillar TO-2, Cummins CES 20078, Detroit Diesel Power Guard 93K214, Mack EO-N Premium Plus 03, Ford M2C171C, Mercedes Benz 229.1, Volvo VDS-3, Allison C-4, and a host of others. Meeting these specs just gives you the knowledge that the manufacturer has gone to extra lengths in manufacturing a product that can meet many important industry and OEM standards.

Man repairing a small bulldozer tractor.
Reduce downtime and enhance your motor oil with the proper oil additive.







Save Money by Using the Best Oil Additive

When considering all the parameters that we’ve discussed in regards to what constitutes the best oil additive for diesels, finding such a product and choosing to use it would appear to be a wise decision.

For many heavy duty equipment owners, the current competitive economic environment requires that all aspects, including the maintenance of heavy equipment, be given the best possible chance in reducing operating expenses and helping to minimize breakdowns and downtime.

Any product that can help keep equipment earning and working is a product worth investing in.

Man repairing diesel machinery.
Extend the service life of your engine by strengthening your current motor oils.