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Hi everyone. I finally got to take my rig out on a pretty long trip and was surprised by the mpg that I got. It is a 2003 Newmar Scottsdale on a Workhorse chassis. It is 37' 9" and weighs about 19,500 lbs. with us in it. We pulled our Jeep Commander on a 2,200-mile trip a few weeks ago. When we left Amarillo, we had to fight a terrible head and cross wind (about 50 mph). We drove east to OKC trying to drive anywhere from 55 to 70 mph to find that "sweet spot" where the coach wouldn't have to downshift to fight the wind and slight hills. We fueled in OKC and got about 4.6 mpg. I wasn't totally surprised by this due to the wind. We continued our travels east to Nashville, Tn. I drove most of the trip at 65 mph but did try to slow down for a few tanks but it didn't seem to help. The best I could get was 5.5 mpg. The best I have ever gotten was 6.9 from Amarillo to Okmulgee, OK. driving about 62 to 65 mph. It has a brand-new air filter. The exhaust seems to be okay and not clogged or anything like that. No foul smell like a clogged catalytic converter. There is no check engine light and the engine seems to run great. It has plenty of power, never gets hot or misses. About the only thing it has ever done is have a low idle at times but that seems to have cleared up recently. Is this normal for a rig of this size? Is there anything I can do to get some better mpg? I am not expecting a lot, but I think that 5.5 is a bit low. Any and all thought are welcome. Thanks