I did some ...... I would say brisk driving..... maybe topped out at 85 just to feel her out... normally I rev her to between 3k and 4k on gears before shifting.... I had to take off though once and revved it almost to 6k and another time to like 5k. Think that would be a problem? I got less than 150 miles on the car. I guess I could really get all those shavings out first 1000miles and then give her an oil change. Anyone here use Royal purple? I got a Supercharged Corolla XRS and I swear by the stuff....