Originally Posted by Attitude
We've only had for a week, so stock tires, tire pressure around 42psi
There are several stock tires !!! Some with better MPH than others.
The Altitude may have a different tire as well.
Yikes 42psi and still getting that Kind of MPG.
I'd be close to 30MPG on highway if I ran mine that high.
Something sounds a miss.
See what you get on straight highway. With that pressure at 65MPH you should get at least 24 MPG (even not broken in).
Everyones "back streets" are different.
Highways are mostly the same for everyone except mountain highways.