Whats your best MPG? - Diesel Bombers



5.9 Liter CR Dodge Cummins 03-07 Discussion of 5.9 Liter Dodge Cummins Diesels with Common Rail Injection

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Old 06-27-2011, 01:31 PM
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Horn Whats your best MPG?

New to owning a diesel rig but I work on the big ones everyday. Just curious to see what ya'll are getting for fuel economy with your rigs and what mods were done to it?

Lookin for the best combination for fuel economy and towing (a fairly light toy hauler)

I have a bone stock 05' 3500 with the 6 speed, 4wd, quad cab, long bed. And im averageing 22-23 mpg city/hwy (according to the trip computer)
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Old 06-27-2011, 10:13 PM
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I wouldn't trust the trip computer cuz mine says I average between 20-23 mph best way fill your truck up drive it x number of miles and divide miles by the number of gallons for accurate mpg. I'm getting about 15-17 in town and 17-20 all highway.
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Old 06-27-2011, 11:38 PM
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I have a stock 07 5.9 QC 4x4 auto and hand calculated I have gotten 19 to 20 on long road trips cruisin bout 70, towing my 19ft toyhauler up 6k ft in elevation in 180 miles I got 10.5 mpg at 65. The toyhauler loaded is about 9k lbs. This winter I am lookin foward to see what kinda mileage I can get goin to Glamis which is mostly flat.
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Old 06-27-2011, 11:49 PM
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The best I've gotten was a little over 22 MPG trying to stay at just 65 MPG for 4 hours straight (hand calculated) and then another 4 hours back home that day. It's stock...haven't bothered looking at the MPG when pulling the trailer though.
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Old 06-28-2011, 12:13 AM
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im in the city my ***** stock my best is 10mpg
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Old 06-28-2011, 12:31 AM
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Jeez hillbilly. I'm sure those 37's aren't helpin any. Haha.

Well 20mpg is better than my last truck. 99 f150 that got 12-15 average and 8-10 towing my 1st gen 16' toyhauler.
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Old 06-28-2011, 12:35 AM
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there not
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Old 06-28-2011, 12:44 AM
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Average 20mpg.
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Old 06-28-2011, 06:25 PM
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Yeah my old gas truck 04 Ram 1500 QC 4.7 auto 2wd got about 15 highway unloaded and got about 6 to 7 mpg pullin the same toyhaluer as above and that was at about 35 up any hills and not 65
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Old 06-28-2011, 06:31 PM
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22-25mpg, 6.5 liter T.D. Chevy 2500 (1994)
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