Best fuel economy speed
What speed are you folks seeing your best mileage ? When I was towing it was not always the low end of the range.
Forum Discussion
Wolfe is right on - generally your most economical "travel speed" is the lowest speed where you can easily maintain 6th gear (I'm assuming a DP with a 6 spd Allison). In my current coach that is about 60-62 MPH. Rule of thumb from Cat and Cummins fuel economy information is that you lose about .1 MPG for every 1 MPH over 55. So the difference between 55 and 65 is about 1 MPG - this is mainly based on aero effects because aero drag goes up with the square of the velocity.
