Originally Posted by wicked1
What are you towing and with what Truck that you get this
2014 F150 FX4 Crew 4X4 EB
2015 Roo 23IKSS
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He replied a couple of pages back, he's towing with a VW TDI Toureg, which I can believe. Those things are beasts.
1998 Ram 1500 2wd, 5.9 gas, 6500lb travel trailer with the rippled aluminum siding. I got 14mpg empty and 7mpg towing, at best. Dead on the rule of thumb, 1/2.
2001 Ram 2500 4wd, 5.9 HO diesel, same TT, I got 18-20mpg empty and 10.5mpg towing like a clock. Slightly better than 1/2.
Same truck, now the big fifth wheel, 10 feet longer and 5,000lbs heavier but with the bullet nose and fiberglass sides, thus far I'm pulling down 11.5mpg. Aerodynamics is very, very important. Only about a 42.5% drop.
I put a Banks kit on, and while I haven't done a mileage run yet monitoring the gauge it's improved it greatly.