From Columbus GA to Nashville TN...... - Ford Powerstroke Diesel Forum
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post #1 of 4 Old 02-24-2012, 07:31 AM Thread Starter
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From Columbus GA to Nashville TN......

2012 f250 ccsb 4x4, 3.31 gears, 245/75/17s

378 miles, 19.9 gallons
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post #2 of 4 Old 02-24-2012, 10:20 AM
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I'll save you all the trouble, , , , , ,

That's 18.995 mpg!!! I think if you had coasted down that big hill, she would have cracked 19!!

Pretty sweet an 8000 lb. truck huh?? Add in the fun and comfort factors and these Scorpions are nice.

The more data we collect, the more I'm thinking the 3.31 gear set is the ticket. I had the 3.55 gears in my F250 and it ran upper 16s mpg on the road. It had plenty of power, even with a 12,500 lb. RV behind.

I'm not even going to go into the mileage on my F450 with 4.30s. Ratio sure impacts mileage for sure.

OK, OK, , , , , mid 14s with the 4.30s. Sheesh!!


2012 F450 Ultimate Lariat pkg, 4X4, FX4, 5th wheel prep, camper pkg, 40console40 seat, Ingot Silver and Black guts
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7.4 mpg as shown @ 70mph and 25740 lbs gross!!

2012 Fuzion FZ310 Monster Edition Toy Hauler 12,500 dry 16,500 loaded to play. 3100/3500 pin weight

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post #3 of 4 Old 02-24-2012, 10:42 AM Thread Starter
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90% was at 65-75 mph. Had a 9 mile detour off I65 which was 45-55 light commercial area.

MPG gauge read 18.5 when I pulled up to the opryland hotel. I noticed that the MPG gauge was showing 16.5 until about 120 miles into the trip, when the truck went through regen. Then MPGs shot way up. I'll post data for the return trip as well.
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post #4 of 4 Old 02-24-2012, 03:33 PM
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I didn't see much difference between 3.31 and 3.55s on the two trucks I drove (RPM wise). They seemed identical (3.31 had 18" wheels and 3.55 had 20" wheels) at 60mph, so I think the overall tire diameters adjusted things so the RPMs were the same.
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