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3500 dually Mpg sucks! how to improve

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Old 11-20-2007, 09:20 PM
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3500 dually Mpg sucks! how to improve

04.5 dually. 4.10 gears and my mpg is around 15 just highway driving. I drive about 140 miles when i travel. When i tow the Mpg just stays at 8

Im looking to see what everybody is using to help there mpg

Im looking to get soon:

intake,muffler delete and possibly a boost fooler( how much will that help)

also whats your mpg?

thanks alot
Old 11-20-2007, 09:27 PM
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How fast are you driving non towing?Towing and what kinda weight? Is your truck a 2wd or a 4wd?
Old 11-20-2007, 09:27 PM
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A rokktech crank sensor will get you about .5 MPG. The best thing to do is keep it under 70 MPH. If you had a boost gauge you could drive by it keeping the boost under 10 psi. Try to keep the Torque converter locked. It normally locks around 45 MPH empty and unlocks at 40 MPH. A Quad box will get you 2 or 3 MPG gain. They have a new max mileage module too. You can get up to about 17-18 MPG max on the back roads with summer fuel.

Edit: You have to weigh the cost and see if it is worth it to you. Driving style change is the cheapest.
Old 11-20-2007, 09:36 PM
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I tow a tractor (heavy). As long as I keep it 50 mph, I can get 16 mpg on the overhead !
Old 11-20-2007, 09:37 PM
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By the way, are you using OD lockout/ Tow Haul mode when towing? No need to unless you are lugging the engine or on a steap grade. All you will do is just burn up fuel. Towing I get 10-12 MPG. Mine is a 2wd.
Old 11-20-2007, 09:39 PM
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Overheads are not so accurate. I hand calculate and that is even prone to error due to how much fuel you sqeeze in the tank each time. Towing my TC will not lock until 50 MPH.
Old 11-21-2007, 05:47 AM
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On the highway i go no faster than 70 mph. I forgot to add the truck is 6spd and 4wd.

Just hoping some how i could get 13mpg towing haha, possible?
Old 11-21-2007, 06:31 AM
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I average 14.5 to 17 with full racks & loaded topsider toolboxes, no higher than 70 on highway, alot of local driving, occassionally pull a enclosed construction trailer.
Old 11-21-2007, 11:24 AM
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Mine got 15mpg unloaded and stock with 4.10s. 12mpg after the lift/tires
Old 11-21-2007, 04:50 PM
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i would to love to even get 14.5 haha anybody have an idea on improving the mpg?
Old 11-21-2007, 05:06 PM
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Buy a used Honda.
Old 11-21-2007, 09:59 PM
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I have seen a best of 17.2 going 70 - 75 from CT to MD but thats the only time I have broken 17. The highest I have got driving around home is 16.7 and 16.5. Normally I get between 15 and 16. But if you keep it at 60 or less the mpg is considerably better, but 60 in most situations on the highway is too slow. 55 will get you some awesome mileage but its the same situation as 60. BTW mines completely stock getting that so if once it breaks in and I get some mods on it, if it breaks 17 consistently I'll be extatic.
Old 11-21-2007, 10:15 PM
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Originally Posted by grecododge
Im looking to see what everybody is using to help there mpg
Purchase a 6.7L

Don't know what you're towing, but I have averaged 12.5 mpg towing a 1964 Ford Fairlane 500 on a 2007 GatorMade 16+2 car hauler. Dragging the trailer back empty.....I averaged 14.9 mpg. Truck has around 8300 miles on it.

Greg
Old 11-21-2007, 10:21 PM
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I consistently get 13 - 13.6 mpg no matter if it's city or highway
4wd / auto / stock exept muffler delete and drop in K&N
I could use some help too!
Old 11-21-2007, 10:58 PM
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I get between 7-10 pulling. And believe me somedays I can't believe I did as good as 7
If I turn the TST off I am in the 5-8 range.
Another thing the truck tires on my truck helped the milage out a little to.
8 mpg isn't bad if its a big load and your going 80


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