9MPG and going down - HELP!!
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Senior User
Joined: May 2007
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From: Michigan
9MPG and going down - HELP!!
Guys ... I have a 7.3L Excursion with 4" lift and 33" tires .... my last tank was hand calculated 9MPG .... WTF ... I baby the truck, never go over 2000 rpm, and do 60/40 hwy/city driving ... the mileage has been getting worse with every tank!!! Any help from you guys would be greatly appreciated!!!
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Senior User
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From: Michigan
Originally Posted by F350-6
What kind of mileage did you used to get? Could it be related to winter grade fuel?
Post Fiend
Joined: Feb 2006
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From: Middle Tennessee
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From: Michigan
Originally Posted by medhvac
ULSD may have something to do with mpg
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From: house springs,mo
Originally Posted by Roody727
Has fuel changed in the last few months? I thought ULSD is what I have been using all year? The change has been over the 1 1/2 months ...
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Senior User
Joined: May 2007
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From: Michigan
Originally Posted by medhvac
some service stations including flying j have already begun changing over to ulsd and effective december 1 2010 all service stations well be required to carry ulsd fuel.its estamated that ther could be a 1% reduction in fuel economy!
Fleet Mechanic
Joined: Sep 2006
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From: IN
ULSD is all I find around here in Indiana and has been sense the beging of the year even the place I use to get my biodiesel from started only carring ULSD. I use diesel kleen every time I fill up and have not seen any problems my other truck lost about 1mpg maybe 2 but that was about it. My new truck I will never really know sense thats all I can get now.
Cargo Master
Joined: Apr 2007
Posts: 2,333
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From: St. Louis, Mo.
Roody - When I started using diesel kleen my mileage went down until I changed fuel filter a couple tanks later. Seems the diesel kleen broke some crap loose and was clogging the filter. Now I run it in every tankfull with no prob. Just a thought.
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From: Michigan
Originally Posted by guitarpicr
Roody - When I started using diesel kleen my mileage went down until I changed fuel filter a couple tanks later. Seems the diesel kleen broke some crap loose and was clogging the filter. Now I run it in every tankfull with no prob. Just a thought.