I have a 1996 Buick Regal with 3.8. Had head gasket replaced and numnut mechanic did a bad job, want to make sure not go bad again. plus probably trade in.already used blue devil head gasket sealer in radiator.
Was the mechanic dumb enough to use 20W50 oil or dump snake oil head gasket sealer in the radiator?
itll be too thick, will result in dry starts, and possibly excessive smoke. none of those additives do any good for your motor, and i wouldnt use 20w50 unless its about 120 degrees out.
