Hi all, This is my first post after purchasing my S15. Non-turbo SR20DE manual all STOCK, high mileage motor so I'm trying to change out everything I can. I have done previous research prior to making this post and have found conflicting info, or just mainly info regarding the DET engine- see below. Engine Oil - Bought some Fuchs Silkolene Titan Race Pro S 5W40 Transmission/Gearbox Oil - Redline 75W-90 or W-140? Diff Oil - ?? No idea which to go with at his moment. Oil Filter - ?? See a lot of 'Hengst' filters and 'Blue Print' filters on ebay- any1 have experience with these?