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Originally Posted by Xotik H3
That black soot is called exhaust. It has nothing to do with external dirt, that soot is Hydrocarbons as a by product of combustion.  |
And most of the soot that DOES build up is when the engine's cold. The I-5 is a tight, well built, modern, fuel injected engine. The oil is not getting contaminated that much, nowhere near as much as a carbed engine of yesteryear. It heats up very quickly, and has a top notch computerized, closed loop fuel injection system. When it's operating temperatures are up to normal, it has very little blow by contaminating the oil. Even in that event, soot contaminates are nowhere equal to silica contaminates (dirt, very HARD dirt, second only to diamonds on the hardness scale)