Currently the car's stock with 16,500 miles, my last one I ran just regular m1 5w30 up to 37k miles @ 320whp/360wtq on 93 (EQtuning tuned, stg2+ equivalent mods) and it's now @ 50k miles with 0 problems, my OCI's are ~4-5k and I drive 8 miles each way back/forth to work plus the time out cruising, maybe i'll give GC 0w30 a shot?