Just got an 82 RX7 and I'm about to change all the oils like transmission/rear axle/steering box. I know it should be 75w90 but synthetic or not synthetic. I read a lot about engine oils on this forum and I really don't wanna start another 'oil war,' I just wanna see what people use.


P.S. I don't really care about engin oil cause i already made up my mind. (non synthetic)

 

Synthetic is fine, use some high quality and you should be fine!

 

Must resist urge to be mean. Dude you answered your own question, or by asking a question that makes no sense. Please read the FAQ and see about why you dont use synthetic oil, and then go and think about using synthetic oil in a tranny and hogs head. i dont think that oil makes it into the engine.