F-550 mileage

rater1979 · #1 (**permalink**) 03-03-2011, 07:15 AM

This is one of our work trucks. Just made a run from Houston to Odessa and avg. 6.5 mpg hand calculated. The gearing kills this truck!

**PolarBear** · #2 (**permalink**) 03-03-2011, 08:10 AM

Ya I'd say it has a few things working against its mileage. Gears, weight, and it looks about as aerodynamic as a brick wall even with the spoiler on top. Oh well, at least its company fuel and not personal fuel its burning. It's a nice looking setup though.

Dietoremain · #3 (**permalink**) 03-03-2011, 08:26 AM

DPF is killing it.

wide body · #4 (**permalink**) 03-03-2011, 08:59 AM

just a guess, but i'd be willing to bet that your rig weighs 12,000 lbs or so? That alone would be a mileage killer. it's probably got 4.88 gears as well. i know on mine, with
4.30s, i'm turning just over 2250rpm at 70mph.

**blueovalman14** · #5 (**permalink**) 03-03-2011, 09:02 AM

Its got several factors killing it and gearing is just one of them.

**Super Diesel** · #6 (**permalink**) 03-03-2011, 10:05 AM

Now... were you guys running the A/C? Because that's a mileage KILLER right there.

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