Full sized diesel pickup towing mpg?

[John E Davies]

Just got home and after 3025 miles at highway speeds we got an overall average of 14.5 mpg. We saw a low of 12.4 while climbing into ferocious headwinds (40+ mph) and a high of 16.4 in milder conditions, descending.

 

The Cummins 5.9 definitely noticed a trailer in back but it didn't slow us down on the grades. I maintained 65 mph mostly, with 70 mph when forced to by traffic doing 85+. It was very relaxed cruising - check out the tachometer: 1750 rpm at 65 mph.

 

 

I love a big diesel for long range towing.

 

John Davies

 

Spokane WA