When an engine's performance has to be improved, we add additives to our vehicle's engine oil. What are your thoughts on this, is it good or bad? Friction modifiers are additives that, when mixed with motor oil, reduce friction between metal parts considerably. These additives work similarly to anti-corrosion and anti-rust additives in that, they generate a long-lasting lubricating layer through adsorption on the surface and interaction with engine oil. Long chains of fatty acids, their derivatives, and molybdenum compounds are among the ingredients in these additions. Anti-friction additives, it should be noted, also minimize wear and help to optimize vehicle fuel economy. Engine oil, gearbox, and fuel supplements are among the many supplements available today. Engine oil additive is one of the supplements available on the market, and its primary role is to reduce friction between parts. You're only kidding yourself if you want to go cheap and risk having limited bandwidth. The prevention of oil volume loss, the formation of deposits, the protection against rust and corrosion, the reduction of fuel consumption, the reduction of pollution, and the maintenance of viscosity are all vital functions of engine oil supplementation. These are the items that engine oil supplement manufacturers frequently announce. 
Paying attention to the health of the car engine is one of the principles of car maintenance. Timely changes of engine oil, replacement of filters, and spark plugs are all effective factors in increasing the life of the car engine. Now in addition to the above mention points, quality supplements for the car engine are also used in a way the health of the car engine can be guaranteed. The car engine compartment and engine components (valves, valves, and piston rings) become sticky and contaminated due to continuous use, and over time, carbon particles, colloids, and residual grease cause the engine to malfunction. By removing these particles and contaminants, the SPD engine wash will improve the engine's performance and increase its lifespan. Also, by eliminating these particles, the power and acceleration of the car engine will increase.
Types of Lubricant Additives
In general, we have different types of additives for oil lubricants. Industrial engine oils have several functions the most important functions of which are engine lubrication to reduce the amount of friction between metal parts and their wear to each other; A lubricant is a material that, when placed between two surfaces that are in contact with each other, reduces the force of resistance to motion or the force of friction between them. Engine oil consists of two components: base oil and additives. The mechanical, physical, and tribological properties of engine oil are mainly due to additives that are added to the base oil to improve or create the required properties; it should be noted that all petroleum-based oils and synthetic oils need additives to improve their performance. 
Another interesting point is that nanotechnologies based on nanotechnology have also had acceptable performance in the field of viscosity correction, thermal conductivity improvement, pour point improvement, flash point, and friction reduction in heavy oil compounds and other lubricants. Additives were first used in lubricants in the 1920s, and since then the use of these compounds has grown exponentially, so that virtually all lubricants today have at least one type of additive, and some other oils have different types of additives. They have additives that vary from one hundred percent to 30% and even more. Lubricants reduce the amount of friction when entering any environment and prevent the wear of moving surfaces on each other. In some cases, the lubricant is responsible for transferring heat and power while reducing friction.
- Liquid lubricants
- Grease lubricants are lubricants that are neither liquid nor solid.
Name 3 Oil Additives and Their Purpose
As we mentioned, we have different types of oil additives for different purposes and here we want to name 3 of them.
- Friction modifier additive
Friction modifiers are additives that, when combined with engine oil, significantly help reduce friction between metal parts; The mechanism of action of these additives is like anti-corrosion and anti-rust additives that create a durable lubricating layer through adsorption on the surface and contact with engine oil. Ingredients of these additives are long chains of fatty acids, their derivatives, and molybdenum compounds. It should be noted that anti-friction additives also reduce wear and also play an effective role in optimizing vehicle fuel consumption.
- Anti-wear and extreme-pressure additives
Corrosion protection of the engine is one of the primary functions of engine oils, and fortunately, the additives used to prevent corrosion in engine oils also have moderate anti-wear properties; these additives are usually long-chain lead salts of carboxylic acid, which are often used in combination with sulfur-containing materials. Soluble compounds in sulfur oil, phosphorus as well as chlorines are well used as anti-wear agents. 
High-pressure additives in engine oil provide excellent protection through thermochemical reaction with the metal surface, which is resistant to high temperatures and mechanical stresses and prevents direct contact between surfaces.
- Antioxidant
One of the most important characteristics of good engine oil is its high oxidation resistance; It should be noted that exposure of hydrocarbons to oxygen and heat accelerates oxidation. The internal combustion engine is an organic chemical reactor to accelerates oxidation, and the metal parts of the engine, such as iron and copper, will act as oxidation catalysts; therefore, engine oil is more susceptible to oxidation than any other lubricant. Various classes of effective antioxidants have been developed over the years that have been used in engine oils and other types of lubricants; the main groups of the most widely used organic and organic metal-soluble antioxidants are:
- Sulfur compounds
- Phosphorus compounds
- Sulfur-phosphorus compounds
- Aromatic amine compounds
- Phenolic compounds
- Organic alkaline salt compounds
- Organic compounds of zinc
- Organic compounds of copper
- Organic compounds of molybdenum
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