First up, the facts: My car is a 96 3.8l Camaro with roughly 107,xxx miles. I bought the car with 60k and in order used Chevron Supreme for 15k, then SJ M1 for 15k, and recently MaxLife for about 9k. I've always done 3,000 mile oil changes. I rack up miles pretty fast since I do about 60 miles a day, 90-95% highway with little stop and go. I'd like to go back to the new M1 so I can go to longer drain intervals. I don't any oil consumption problems or oil leaks. I did have a small oil leak, rear main seal, but had that fixed over a year ago. But I don't want any new ones either... If it makes any difference, I'll be finishing up my first Auto-RX treatment in 500 miles. Thanks guys!