If the emissions sticker doesn't tell you, then go for .040 for standard plugs, .060 for platinums.

And for the sake of all sanity and all that is holy, use only ACDelco platinums. NGK and Denso's are ok too. Same for standard plugs.

Bosch platinums and GM engines don't mix <img src="/forums/images/graemlins/shame.gif" alt="" />


1990 Montero RS (In pieces... for now)

KG6VNX