What is your Fuel Economy?

JEFF69Z28

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GAS MILAGE WONT BE GREAT FROM A 6000-7000 POUND TRUCK WITH 350 HORSEPOWER AND 3.73 RING&PINION AND TURNING 2 AXLES.
 

Zixxer2Go

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'08 Fuel Economy Update

Current Mods:

1. Bakflip hard bed cover
2. Hypertech Max Energy Programmer - Stage 3. I asked Hypertech what their most economical stage setting was, but they never replied.

I took a trip from Nashville to Dallas just last week towing a small utility trailer with about 500lbs of material. On the way there and back we were fighting pretty stiff winds.

A. For the first 350 miles, we averaged 14.5mpg. For the second 350 miles, it was closer to 13.5. Average driving speed was 74mph...total average for the trip to Dallas was 68mph.

B. On the way back, we were getting some strong cross winds, and pulling an empty trailer. The first 350 miles we averaged about 14.5mpg, and the second half we averaged about 15.2mpg. Same driving speed, same average.

C. In-town driving we average about 12.5 to 13mpg. By that, I mean I'm not heavy on the gas or stop fast...so, I think my next economy upgrade will be a new air box. The Super Duty is a nice truck, but I was getting better fuel economy with my '04 Avalanche.
 

Bolt

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So how is a motor (6.0, 7.3) that gets 50% better mileage than a 6.4 polluting more than an inefficient pig with a DPF?
 

circle1110

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very bad fuel economy on my 6.4
10 miles to the gallon. Really sucks, but only have 1000 miles. hope that it gets better
 

bears4x4

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Just to give me 2 cents:D , i get right at 17mpg on the hwy thats what i average to Missouri and back ( Houston) empty, with my old cargo trailer 6x6x12 i got 12.5 mpg to Utah and back(Houston) , with 75mph being average speed on cruse control
 

yjboss

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my 08 is getting 14.5 unloaded. it is a 250 crewcab 4x4 with around 6000 miles. But i'm ready to get something done with this exhaust! That filter really seems like a horrible idea.
 

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