Truck HATES going over 55 as far as wind resistance goes (but i've still had it going about 140 lol)
I'm going to have to say 27 MPG is hard to believe. The best I've gotten HWY is 20.3 mpg. That was a 200 mile stretch with 2 stop lights and two on ramps. Speed limits anywhere from 55-75 and me following them.
1969 Chevy RCLB C10 350/TH400 SOLD
2007 Chevy RCSB 4.8 4x4 LS SOLD
2008 Chevy RCSB 5.3 4x4 LT SOLD
2010 Chevy CCSB 6.2 4x4 LT SOLD
2005 GMC CCLB DRW 6.6 Duramax 4x4 191,000 and counting
2013 FORD CCSB F350 6.7 Powerstroke 4x4