In this paper we analyze motor oils in modern oil engines. There is an indisputable need to diagnose all engines, including diesel, nowadays in order to track their condition in terms of timely prevention
and occurrence of unwanted engine damage.
By diagnosing motor oils in modern oil engines, their properties are monitored and monitored, on which the more controlled operation of the engine during its life depends.
The first prerequisite for early diagnosis of the condition of the engine is the correct determination of the causes in the engine oil by following its parameters: viscosity, ignition point, water, glycol, TBN,
TAN, oxidation, sulfur, soot, elements of pollution, and abrasive metals .
Motor oil fulfills its functions is equipped with a package of accessories - additive
