My oil consunption has always been 1 qt 3000 mi after an oil change. This is with 5w40 RotellaT syn. I had the same consumption with dino oil too. After the 3000 mi it would consume 1 qt per 1000 to 2000 mi. I would change the oil at 6000 to 8000 mi. Now that I am homeless in Colorado, I have been driving 120 mi round trip to and from work to the motel. This is at 80+ mph up some mild hills where I have to rev up the rpms to keep it at 75 mph so the rpms are way up there. It has been 3000 mi and this time I had to add 2qts. Is there a probem? Should I just keep adding oil? Or should I go dino oil and change at 3000 mi?