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View Full Version : Engine Oil GF4 RX8-LEO 03-08-2009, 10:35 PM I just change the engine oil, which is SpeedMaster SM/GF4 5W30. Go back to see the owner guide, it only status it is recommend for GF3 oil, so what is the different btw GF4 & GF3 oil and is it harm to Rotaty engine if I use GF4? :uhh: StealthTL 03-08-2009, 10:43 PM It's perfectly fine. SM has replaced SL rated oil in the USA 'SAE' rating system, it's an updated rating, latest and greatest!. For Europe/Far East, the GF3 rating has been updated to GF4, same thing - direct replacement for GF3. nycgps 03-09-2009, 12:15 AM It's perfectly fine. SM has replaced SL rated oil in the USA 'SAE' rating system, it's an updated rating, latest and greatest!. For Europe/Far East, the GF3 rating has been updated to GF4, same thing - direct replacement for GF3. latest, yes. Greatest ... not quite :) StealthTL 03-09-2009, 12:35 AM How about - 'Only Game In Town' then?:lol::lol: nycgps 03-09-2009, 12:48 AM How about - 'Only Game In Town' then?:lol::lol: You win ! :bowdown: |