i recently had my oil changed at a shop. the day after i heard a tapping noise followed by the check engine light coming on. i took it back to the place that changed the oil who said i have a minor cylinder problem. i then took it to the dealership where i brought it to see if i had a warranty. they put a product called heavy duty zmax in it without draining some of the oil out of my engine. shortly after that i heard a pop and the my engine started to rattle. i want to know is did the zmax cause my engine to throw a rod?
Sep 20, 2009 at 7:19 PM