Friction is the enemy of efficiency. At least that’s the case in internal combustion engines. That's why oil is such an important ingredient to the longevity of an engine’s life, as well as its ...
Some thoughts on oils used to lubricate gasoline-fueled engines: 1. The latest, “highest” API (American Petroleum Institute) rating for oil used to lubricate spark-fired engines is “SN.” The API SN ...
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