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If you have noticed that on the highway under heavy loads you have started to consume more oil than usual, and the engine pulls as it pulled, in the city the consumption is not noticeable, then one of the reasons for this is the leaky channel of the crankcase gases between the head and the breather cover, which goes into the intake manifold. The more you give the engine speed, the greater the resolution in the intake, the principle of a vacuum cleaner only powerful, therefore the leaky channel leads to the fact that the oil together with the crankcase gases goes into the intake, and there through the intake valves into the combustion chamber and settles as a white velvety coating on the spark plugs in the form of coral growths. I know that maybe I did not open America for someone, but perhaps my video will help someone in solving this problem. All the best!