6.5 mpg towing???? - PowerStrokeNation : Ford Powerstroke Diesel Forum
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post #1 of 5 (permalink) Old 01-11-2009, 11:56 PM Thread Starter
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6.5 mpg towing????

I have a 01 350 CC dually 4x2 w/4.10 gears that we use to pull a 40' gooseneck. The truck has a superchips tuner on the low setting (i know its not the best), air intake, 4" exhaust, and gauges. Sometimes we haul 2 F-550's (cab and chassis) at a time or just one. I have never been able to get above 7 to 8 mpg loaded or unloaded and most of the time its 6.5 mpg. What is wrong with this truck i know it can do better. I dont run flat footed either 60 mph tops. Any help would be great, my dad gets better mpg with his 379 Pete!
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post #2 of 5 (permalink) Old 01-12-2009, 12:10 AM
That thing got a Cummins?
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Re: 6.5 mpg towing????

It sounds like you are running that truck way overloaded,and if by empty you mean the trailer is behind it but nothings on it, you still have alot of wieght/drag to overcome. The biggest reason the pete gets better mileage is you have more gears,torque and horsepower to move the same amount of wieght. I think you just ask to much of the truck to get decent mileage pulling that kind of wieght. Just my .02

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post #3 of 5 (permalink) Old 01-12-2009, 12:12 AM
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Re: 6.5 mpg towing????

I have gotten anywhere from 6.0 to 20 mpg. I haul a 25ft trailer with 13 atvs standing on end and with the hills and the wind I have to stop between 150 and 180 miles and fill up. I dont think theres anything wrong with my truck you can just tell your working it. I weighed my truck with the atvs and trailer it it was about 20000. I run 70-80 on avg. I could slow down and not work my truck I bet I would get a bunch more out of my tank. I dont believe what people tell me the get for mpg. I just know running emepty with a trailer I can get better than a gas power truck and thats what matters to me.


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post #4 of 5 (permalink) Old 01-12-2009, 03:55 PM
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Re: 6.5 mpg towing????

Do you have a boost gauge on it?
I don't see how you could get that bad of mileage towing.
FWIW, I towed a 22ft car trailer with my toyota rockcrawler (in the works) and a pair of atv's and averaged 14.
I'd start by upping tire pressure, (assuming it's auto) doing a shift kit, and checking for boost or exhaust leaks. maybe check the turbo for shaft play...
just throwing these out there, but they can only help and checking's free.

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post #5 of 5 (permalink) Old 01-12-2009, 04:34 PM
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Re: 6.5 mpg towing????

Loaded with the trailer and 2- F-550's you have to be around 30k gross. I average around 7-8mpg loaded to 40k gross, depending on the terrain, but thats with 4.88's and Jody's 60 or 80 tow tune. The worst I've ever gotten was 6, but that was pulling the GN with a 680 Case backhoe from NJ back to OH through some nice hills. I'd try Jody's 40hp tow tune to start and work from there.

2000 F-550 CC, 2wd, 6 speed. Homemade bed, 5" exhaust, DP chip, water inj, intake, gauges, ect

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