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The car is a 1994 Mazda MX6 with the 2.5L V6. The engine is the original stock engine with 125k miles, only bolt on modifications. It's used primarily as an autocross and track day car. The oil is 4 quarts Redline 20w50 and 2q Redline 5w30 to achieve ~15w40 mix. Oil filter is a Napa Gold P/N...

I know that the BG synchro shift is good stuff from what people have told me. And our distributior for BG products came into work the other day so I asked him about it...Yikes, $14 a quart...anyway I told him the issue I was having with my 1G PGT with grinding into 2nd when I shift fast at high...

Just what the title says, either I haven't found them yet or don't know where to look. I'd love to see some comprehensive testing done on the major oil filters out there. I've got some basic knowledge as to which are better than others, but no hard evidence. If none is here, does anybody have a...

I'm having a very nice long discussion on the benefit of GL-4 over GL-5 oil. So far through searching on this site I've already learned a LOT. Anyway the topic of our discussion is basically about the safety of GL-4 versus GL-5 and it's sulfur content and how it affects 'yellow' metals...