i always think of oil as blue. is the grey dark or light? valve seals generally leak when decellerating with the foor off the gas. rings under acceleration. running too rich could be dark gray. coolant (steam) is easily distinguished because it disappears right away.

tom w

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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.