I put another motor in my truck a few months ago. It's been running great with tons power. But my fuel mileage isn't near as good as it was with the other motor. I am getting about 15 mpg now and I was getting about 20 mpg before. I think tuning the motor would help alot. It also doesn't smoke very much anymore which I think is odd. Do you guys have any tips for tuning the engine properly?

 

timing light and turbo. Kinda depends on the engine too. My dad and my friend have pretty much identical trucks, WB, drivetrain, etc and one gets 19 the other gets 14, my dads gets 14 and im sure hes a much more conservative driver.