This is my first post, so HELLO to all fellow enthusiasts! My background... I have a RX-8 and it is in break-in still (I'm going up to 8,000km without synthetic, thats 5,000mi). My 'stash' of GC green (M04) is up to about 15 quarts, just waiting for that magical moment when I pour it in for the first time. Hopefully I can find a good oil filter up here, haven't had any luck... I did notice a 'max life' filter at Canadian Tire (I think that is Valvoline brand) My local store has 12 quarts of the M03 GC, is it worth buying or should I keep looking around for more M04 (there is lots up here still I think). Thanks for your knowledge, and drive safely. Looking forward to good 'chats' on here.