While traveling on our first big run to Florida from Iowa last April, we found that we could not put much gas in our unit also. Men on board were VERY frustrated. FINALLY, figured out that the air vent to the gas tank (I think this is right) was dropped down. It had been fasted up with black electrical looking tape (go figure!) and couldn't stand the journey. Anyway, once that was fasted back up with one of those little plastic securing ties that my husband had on board, we have been fine ever since. Did hear quite a bit of interesting language before he crawled clear under the unit and found the problem.
Lyle & Janet
Worth County Missouri
Chevy Chassis