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Old January 13th, 2008, 08:38 PM   #10
Covered in mud...
Haggar's Avatar
Join Date: 11-06-05
Location: Oxford, MI
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Two things here:

1) The fuel usage meters aren't very accurate, and are calibrated on the optimistic side. I'm rather curious about the bully dog setup... is that a piggy back? Know how they work, on a signal level? And how those signals are also used to calculate estimated fuel usage?

2) Most importantly, varied between 40-70, probably a 55-60 average, and I'm guessing in the UP... which means flat, straight, and very few stops.

I can completely see that mileage for that situation, unloaded truck (sled does nothing), those driving conditions.

For example, no matter the vehicle, when I visit my parents (180 mile round trip, completley flat very few stops, 55mph two lane roads, in the thumb), our vehicles get 20-30% higher mileage than our normal mileage. Last trip there with my V10 dodge, I got 11.7mpg towing an 8500lb load (large tractor with loader, forks, other stuff), that be 8-9 mpg down here.
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