I got better mileage after I broke 10,000 mi. Don't expect too much. I get between 6.5 to 7.5 depending on speed, doesn't matter if I'm towing or not. I once got 8 MPG on 1 tank but conditions were perfect.
<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by Y-Guy: Are you carrying full take of water? We get just about 8 with ours when we don't have our ATV trailer. Then again I am a light foot and cruise between 55-60. </div></BLOCKQUOTE>
No, I had the tanks almost empty and we cruise at about 60MPH. But, we are heavy...300# of dogs alone. But we had the same weight in the 35U.
I found a half mile per gallon improvement on my 01 Winnie Ford at about the 12000 mark. It has not changed since, so I am assuming that is about what I am going to get, 7.5 mpg, towing, at 60 mph and an occasional passing of 70. My previous 454 chevy's did about the same.