well thats what seperates the big guys from the guys who think they know. a black soot on the plugs isnt oil. its fuel. its what is known as fouling. if it were oil well it would be oily. and it would smell like oil. if that is the case then my mistake, but from what was described it sounds like fouling plugs. as for being normal, when yo work on enough motors youll see that that happens alot. maybe not on the few that youve seen. either way, a leak down test isnt needed. unless theres smoke coming from the oil fill or breathers or the exhaust is smoking with a oil smell its not his rings.
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