Today i let my broter take my jeep to work with him. He did an oil change for me since he works at ford, and its all nice and warm there unlike outside. Ford just got this new engine flush, it soposidly cleans out the whole engineand reconditions the rings, and all that jazz. When he brought it home i took it out for a test drive, and i have to admit that it actually made a noticible difference in preformance. The flush only cost like 10 bucks, id say its worth every penny.