I own a 2000 Dodge Gr Caravan w/3.3L. Been running Mobil Super HM in it for a couple years now. This is not really in regard to the type or brand of oil, but I have a question about consumption. I have only 1000 miles on this new oil change. Have had a few days of 90 degree temps and several road trips and I just checked and had to top off with a half quart of oil. No leaks on the ground or anything. Is that normal given the temps, running the AC, etc? 129k on the odometer to. Should I consider a different HM oil than the Mobil Super?