The top high mileage oil additives are what you need. The top market possibilities are reviewed in this post for your consideration.Every driver is aware that having clean oil in an engine plays a crucial part in ensuring an increase in the engine's performance. Therefore, it is necessary to replace the oil in an engine on a regular basis, say every 6,000 to 10,000 miles.

This routine replacement is done to make sure that the engine is solely filled with pure oil. But motor oils do vary; in this case, we're not discussing viscosity or brand, but rather the additives that are employed in various motor oil formulae.

It seems that the ingredients in the formulations of two distinct brands of 5w20 oil are probably not the same. Nevertheless, buying oil additives might be a smart move, particularly if you drive a high-mileage car, regardless of the chemicals that motor oil producers employ.

High Mileage Oil Additive: What is it?

High mileage oil additive is simply a specifically developed mixture that is intended to combine with the oil in your engine to provide improved engine efficiency, longer protection against wear, and constant cleanliness of the internal engine components.

Motor oils already have additives in their formulations, but these aftermarket solutions often provide greater oil distribution and flow at various temperatures. Of course, these oil additives, also known as engine additives, have various formulations, so you must be cautious while selecting.

We've made things simpler by including a buyers' guide in this post to assist you in choosing the finest high mileage oil additives. Because they are designed to be used with high mileage vehicles—those with more than 75k miles—they are referred to as high mileage oil additives.

Various Oil Additives

Simply put, oil additives are "supplement" formulae that are used with motor oil to perform various tasks. You may add a variety of additives, sometimes known as oil supplements, to the engine of your automobile.

Anti-Wear Substances

As the name suggests, these oil additives are designed to stop wear; they cover the internal engine parts and surfaces to guard against wear.

Modifiers of viscosity

According to their grades, also known as "Viscosity," motor oils are marketed and utilized. If you're not using the engine's recommended oil grade, you should apply this kind of addition.Consider applying this sort of oil addition, for instance, if your engine requires 5w20 motor oil and you are using 5w30, so that the oil will flow smoothly regardless of the operating temperature.


These are additives used to suppress rust and corrosion and stop chemical breakdown. They minimize oxidation by neutralizing the acids in motor oils.


It's quite obvious what this means. To guarantee there is no sludge, filth, or buildup to hinder or damage the engine's efficiency, detergent oil additives are specially designed detergents that are used to clean the interior of motor engines.


Air bubbles are readily dispersed because anti-foaming chemicals lessen the surface tension between engine oil and air bubbles. Tiny air bubbles that may reduce oil pressure are more likely to form in an engine oil that does not contain this ingredient by default.


By dispersing the solid particles carried by the oil as it flows into the engine, dispersant additives assist to minimize sludge accumulation and deposition.

What Caused the Clog in My Catalytic Converter?

Leaky hoses and channels are the usual "culprit." Yes, the catalytic converter may clog up if oil or antifreeze liquid spills into the combustion chambers. Here's how it occurs.Sinopec told us that the carbon and soot deposits continually covering the converter's inner channels until they completely block it because when oil or antifreeze seeps into the exhaust chambers, it causes the carbon deposits and emissions from the engine to thicken.

We all know that oil is fairly thick, and when combined with soot, it becomes much thicker and is capable of obstructing tiny pores and air passageways. Naturally, this will have an impact on how the converter operates, which causes the peculiar symptoms seen by a blocked converter.

Catalytic converters may clog or malfunction for a variety of reasons, not only oil and antifreeze. The functionality of the catalytic converter may be adversely affected if another vital component linked to your engine is malfunctioning.

For instance, a malfunctioning oxygen sensor or defective spark plugs might push unburned gasoline into the exhaust system, clogging the honeycomb air passageways in the converter.With this background knowledge, let's discuss how a blocked converter might result in engine misfiring and harsh idling.

Final words

The majority of drivers are aware that maintaining the life and functionality of their car requires regular oil changes. Changing the oil and filter every 3,000 miles is customary for many people, but advances in lubrication technology have produced oils that may be used safely for extended periods of time. There are simple methods to take care of your engine internals but changing your oil on a regular mileage plan can go a long way toward ensuring that your automobile works well for years.

In many different ways, engine oil additives may help your engine run better and last longer. Most increase the engine oil's viscosity. Others aid in breaking up and flushing away gunk, while others provide the engine internals a kind of coating. Some even act as supplements to other kinds of motor fluids. Adding them to motor oil is the best part, however.

There are enough of these additives to cover a full aisle at your neighborhood car parts shop, and they are all beneficial in some manner. This may cause some uncertainty, particularly for motorists who have never looked for oil additives before. Keep this guide in mind, and you will end up with finding the best oil additive that can help you to keep the high-mileage diesel engine in its perfect condition at all times.