fuel mileage
what do you get pulling a 12,000 lb. TT with your 5.9 Cummins?
Forum Discussion
'06 5.9 CTD towing about 10,000lb TT. 10-11 at 60-62 mph. 1700 rpm with 3.73. Might see 12mpg on a good day. Have gone as low as 7-8 bucking strong headwind. 60-65 mph seems to be the sweet spot. Would, no doubt, do better at 55 but, never tried it. Mileage drops significantly at 70 and above.
