from talking to a few ppl on here, ive come to the conclusion that a cheap dino such as MC 5W30 would best suit my car, as i dont want to go longer than 3,000 mile oci's. but now i think what the heck, its 9 yrs old, runs good, so i wouldnt be scared to try and to prolong my oil change intervals. thinking about GC and M1 0W40. considering GC because ive heard its closer to a 40 wt oil, a very thick 30 wt, and i think that would be good protection for the hot summers my car endures. same reason im considering M1, thicker 40 wt for the hot summers. but my concern is, isnt a 0W oil better for winter startups? should i use something with a thicker starting wt during the summer? and also do i need to let the car idle for a few mins in the morning to let the 0W oil circulculate better before i accelerate hard or anything, as opposed to a 5W oil?