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 car about engin oil cause i already made up my mind. (non synthetic)