I've got an 87 fiero that is getting oil in the gas and gas in the oil I don't think it's a vacuum leak because if I clean the plugs off and put them back in it runs great I mean like a top for about 3 miles or so them the plugs fowl out again and It spits sputters and dies but it also has gas in the oil at first I thought it was just getting flooded and gas is getting in the oil that way but I changed the oil three times now and it still has gas in it every time I check it I can smell the gas in the oil