Why is all this so important? The answer to this question lies in the plane of the chemical composition of motor oils and the properties of additives that are added to the oil by the manufacturer. In short, we can say this: all oils have a different set of additives and therefore are designed for different engines and operating conditions. The wrong choice of oil, namely this bouquet of additives, will at least reduce engine power and increase fuel consumption. Maximum - just significantly speed up the overhaul of the engine, no more and no less.