01 F550 4x4 - Ford Powerstroke Diesel Forum
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post #1 of 5 Old 02-09-2013, 10:43 PM Thread Starter
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01 F550 4x4

So we just got a new to us wrecker. Its a 550 auto 4x4. it has 276k on it. Its been getting about 9.3 mpg average. The truck is running all the time though and the idle kicks up to 1200 rpm when the pto it turned on. Its an electronice engine mounted pto. I was wondering what these trucks should get for mpg? Not sure what gears we have in it but at 65mph the thing is right at 2500 rpm.. I dont really want more power but if there is anything we can do to get better mpg that would be great. As much as we drive a 1-2 mpg would be great especially since the tank is only 19 gallons because of the wrecker body... Thanks for the help in advance..

MINE 03 toyota tacoma 4x4, some total chaos stuff and other bolt ons, 17" of travel all the way around
WORK 05 F450 with a Century Auto grip wheel lift. Great REPO truck. EGR Delete, livewire tuning, 270K miles and going strong.
WORK2011 F550 flatbed, stock for now 55k Miles( gone thing was a POS)
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WORK 01 F550 4x4, jerrdan HPL35 wrecker bed, 278K, stock
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post #2 of 5 Old 02-09-2013, 11:51 PM
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You need to drive slower, 2000 RPM is the sweet spot for MPG. Unfortunately with a 550, you have really low gears so your sweet spot for MPG will be something like 45-50 MPH.

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post #3 of 5 Old 02-10-2013, 06:53 AM
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It has 4.88 gears and is probably pushing 11k lbs with the body on it... What do you expect?

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post #4 of 5 Old 02-10-2013, 07:45 AM Thread Starter
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yeah I cant go 45 mph...

Its closer to 13k with the body, but our other truck is the same truck and its a 6.0, Its deleted and running a mild tune and if I keep it at 65 its will get anywhere from 12-13 mpg depending on how cold it is.. I was really hoping I would get about the same as the 6.0 as far as mpgs... Im really thinking about regearing it... For what we use the truck for it doesnt need the 4.88 rears..

MINE 03 toyota tacoma 4x4, some total chaos stuff and other bolt ons, 17" of travel all the way around
WORK 05 F450 with a Century Auto grip wheel lift. Great REPO truck. EGR Delete, livewire tuning, 270K miles and going strong.
WORK2011 F550 flatbed, stock for now 55k Miles( gone thing was a POS)
WORK 08 RAM 5500, Snatch Truck, Few goodies to push 450 hp and actually get 17 mpg on the hwy
WORK 01 F550 4x4, jerrdan HPL35 wrecker bed, 278K, stock
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post #5 of 5 Old 02-10-2013, 07:53 AM
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Thats average for a 7.3 550. Remember the 6.0s got another gear in the trans

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