For me, I believe the performance and the economy on diesels are much better than gas trucks, but only if you chip them. My former boss just put a chip on his '07 Duramax Classic and is running at 23mpg and has about 650 hp and 850lb of torque. He took it to the track the other night and ran a 13 flat. That mother fu<kin thing hauls ass. Of course, we all know the 23mpg doesn't really matter because diesel is a dollar or more higher than gas now. What are your opinions?