350 fuel mileage - Ford Powerstroke Diesel Forum

 
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post #1 of 9 Old 10-30-2007, 08:12 PM Thread Starter
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350 fuel mileage

I'm kinda new to the diesel truck scene. I've got a '96 turbo diesel with 410 gearing and the 5 speed manual tranny. I've been told by other truck owners I should get between 15-19mpg towing on the open road but am getting right around 10(with a strong headwind it drops to about 7-and that was using a "name brand" fuel!) Anyone out there got the same setup but with 373 gearing, let me know what kind of fuel mileage you're getting as I'm thinking about changing my gears to 373.
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post #2 of 9 Old 10-30-2007, 08:31 PM
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Thats what I get with My 4:10s also
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post #3 of 9 Old 10-31-2007, 06:56 AM
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I get about 19 on the freeway with my 4:10 gearing and I have the same setup as you? Are you running stock tires?
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post #4 of 9 Old 10-31-2007, 05:13 PM Thread Starter
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Stock tires, no changes to intake or exhaust systems. Pulling a 5000 lb trailer. At 75mph it's revving at about 3800 rpm. I was wondering if dropping to 373's would bring up my mileage enough to justify the cost.Correction--2800rpm/dyslexic fingers!

Last edited by dbblbbbl; 11-14-2007 at 03:37 PM. Reason: wrong rpm's
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post #5 of 9 Old 10-31-2007, 05:56 PM
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I have 3.55's and tow heavier loads than that. I get about 10 loaded and 13-14 unloaded. It was pretty much the same when I had stock injectors. You may want to upgrade the exhaust and intake and definatly go with a 3" downpipe.

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post #6 of 9 Old 11-01-2007, 02:25 AM
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Going at that speed, and reving at that RPM, no wonder your mileage is so poor.
I had a '95 5 spd, 4.10, and at 60 - 65 it reved about 2300 I think. Got 14 - 15 towing a bobcat on the freeway.

3800 rpm, god, you need to change gearing or something!

An OBS or 2, or 3...
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post #7 of 9 Old 11-01-2007, 09:43 AM
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he must mean 2800 rpm not 3800... just because hes a noob to diesels doesn't mean hes new to engine i highly doubt anybody who is smart enough to post on these forums ios dumb enough to run redline
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post #8 of 9 Old 11-01-2007, 10:48 AM
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Mine has a Automatic tranny with a 4:10 and I can only get 14-15 with a couple inches lift and tires slightly larger than stock. I have a DIY intake that did seem to help just a little. Derrick does the 3 inch down pipe help that much, and how difficult is the install?

1996 F-250--Stock (at least for know )except for a 2 inch lift
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post #9 of 9 Old 11-01-2007, 10:53 AM
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I have a 2001 7.3, 350 dually with the 3.73 rear end I get about 12.5 solo and about 11 towing a 10,000 lb 5th wheel. But I haven't bought my DP tuner yet with the 80hp economy setting and the 40 hp tow setting. Hoping it will improve with those sets.
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