Oil Additive

Oil Additive :

Oil additives are chemical compounds that improve thelubricant performance of base oil (or oil "base stock"). The manufacturer of many different oils can utilize the same base stock for each formulation and can choose different additives for each specific application. Additives comprise up to 5% by weight of some oils.
Nearly all commercial motors oils contain additives, whether the oils are synthetic or petroleum based. Essentially, only the American Petroleum Institute (API) Service SA motor oils have no additives, and they are therefore incapable of protecting modern engines. The choice of additives is determined by the application, e.g. the oil for a diesel engine with direct inject in a pickup truck (API Service CJ-4) has different additives than the oil used in a small gasoline-powered outboard motor on a boat (2-cycle engine oil)

Types of Additive :

Oil additives are vital for the proper lubrication and prolonged use of motor oil in modern  Internal combustion engine. Without many of these, the oil would become contaminated, break down, leak out, or not properly protect engine parts at all operating temperature. Just as important are additives for oils used inside gearboxes,automatic transmission and bearing . Some of the most important additives include those used for viscosity and lubricity, contaminant control, for the control of chemical breakdown, and for seal conditioning. Some additives permit lubricants to perform better under severe conditions, such as extreme pressures and temperatures and high levels of contamination.