Originally Posted by Bearwhiz
I have the 5.7 with the 3.55 and at 70 the rpm are at about 1800. I have never gotten anything over 15.8 mpg out of mine. I'd be tickled to death with 20mpg.
I don't always get this mpg since I do a lot more city driving than highway. But you guys should be getting more than 15 mpg on the highway. Ofcourse, the faster you do go, the less mpg you get.