[MVR 155]

Biggest thing with the H2 on the highway is overall speed.... the difference between going 65 vs. 75 can mean a few miles per gallon. I would think you are gonna get as good or better mileage than the suburban that is pulling the trailer. Averaging 75mph towing my 2000 lb 2 place jet ski trailer going to Lake of the Ozarks MO from Chicago IL I got just over 12mpg which I thought was pretty good. Driving locally with mixed city/highway we seem to get the same.... high 11's-low 12's

Have not really road tripped it at all empty.... my better half did drive down to springfield and back but she isnt mileage concious when driving and she has a lead foot, she got pulled over going 83 and was let off.... she is in the Army and was in uniform on her way to a conference. She averaged 12.5 round trip. I would think that if you kept it under 75 and easy on the throttle for passing etc.... that you could get up in the 14-15 range.

Going to full synthetics cant hurt either, change out everything to Royal Purple.... people generally report a pickup of 1-2 mpg and running full synthetics certainly cant hurt, better for the vehicle. Make sure your rig is in great running order as well, inflate your tires up to 37-38lbs, clean air filter and fuel filter would also be a good idea.