I used the Hirsh rattle can and its great, 'cept when I messed up an oil change and forgot to ensure the seal was off from the old filter and blew oil all over the engine just before the Seattle Pontiac show, had to pressure wash it off, lost a few flakes by the passenger head, thankfully Brett ran over and a buddy had a can of Hirsh to touch it up...but 3 years and its flawless...