The effect is manifested by the fact that Bell Hammer Seven and Bell Hammer Light are added to the engine oil and the oil is completely black when it is replaced.
Black stains are called contamination (oil stains), and are stains that occur when metal atari, which has not been eliminated until now, is adjusted.
The sledge of the oil element is also reduced, which is the best criterion for suppressing metal wear.
In addition, if you continue to use the bell hammer, oil stains will gradually decrease, which will directly lead to a dramatic extension of engine life.