Towing MPG's at 17? I'm impressed.
285's, and my mods make towing our 5er up steep Oregon grades and winding roads a snap - last RV trip out to Oregon coast and back - 1200 mile run - delivered the best ever towing MPG of slightly over 17 MPG - with power to spare!
Simply drop into 5th gear in the hills, and cruise at about 5 MPH over the state 55 MPH speed limit - uphill. The 285's place the Cummins RPM right in the middle of it's "sweet spot" at that speed in 5th gear!![]()