I have the same ride, two of them, and seem to be getting better MPG's than you. I've also run above 9000 ft in Utah and didn't really feel a power loss, even when carrying two. Sounds like your assessment may be correct.
__________________
08 stealth 500 Touring
08 red 500 Touring
08 Chevy 2500HD
30' rolling fun house
too much fun...not enough time
www.craigtiscareno.com
|