Just walked out with my 5.7l Challenger T/A PLUS yesterday. Already I am thinking of what I can do to make it a better ride. Not necessarily concerned about speed...sorry guys looking more for DIY MODS that can increase the longevity of my powertrain, smoothness of the ride and yes even if its only by 1 the mpg. So far the only thing ive heard of is an oil catch. More help please!!! Almost forgot tips in general on how to take care of her please. For instance ive never had a car I cared about the paint job for until now. Any lessons learned of does and donts? What fuel should I use? 89 okay?