Originally Posted by bpdchief

Well the Factory Service Manual, FSM, that I have in front of me right now recommends 5W-30 if you live in an area where the outside temps are -20 degrees Farenheit to 40 degrees Farenheit. (not many places in the lower 48 that are in that range.) The recommended oil is 10W-30 if you are opertaing your car in -15 to way above 120 degree farenheit temperatures. It's 10W-30 conventional oil, not synthetic. Personally, I run 10W-30 in the 88 NA, the 86 Turbo II, and the 93 FD. No one particular brand, just get a well known brand. The turbo II and the FD get new oil and filters anywhere between 2500 and 3000 miles. The 88 goes about 5000 before a change. You should change your oil on an FD at that interval because the Twin Turbos have a tendency to break down the oil quicker. Incidentally, oil capacity is 5.2 quarts for every FD model ecept for the R1. The R1 is 5.7 total quarts. Hope this helps.

Originally Posted by Joshua Nalley

I just bought my RX7 and switched from the Royal Purple that was being used to Pettit Racing's Revomax specifically designed for the Rotary motor. Its like $22 I think. I'm happy with it so far.