MPG problem
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Senior User
Joined: Jul 2011
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From: Baytown, TX
MPG problem
Were headed to our deer lease right now in my 99 f250 SD diesel and filled up about thirty miles back. Were pulling about 2-3000 lbs and were already down to 1/4 of a tank. But were also in stop and go traffic going through Houston. I calculated it and its saying were getting 5.2 MPG. That doesn't seem right especially in a diesel. Anybody know what might be the problem or have any suggestions?
9 ECHO 1
Joined: Aug 2009
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From: Missouri
Logistics Pro
Joined: Jun 2005
Posts: 4,243
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From: AZ
Were headed to our deer lease right now in my 99 f250 SD diesel and filled up about thirty miles back. Were pulling about 2-3000 lbs and were already down to 1/4 of a tank. But were also in stop and go traffic going through Houston. I calculated it and its saying were getting 5.2 MPG. That doesn't seem right especially in a diesel. Anybody know what might be the problem or have any suggestions?
Cargo Master
Joined: Oct 2010
Posts: 2,089
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Did u leave it running when u filled it? Mine takes a long time to reach full when I leave it running. Sometimes 50 miles or more. If i cut it off and restart it, it will read right.
If that is not the case, i'd say something is wrong unless u have mega tires. My truck is a stock extd cab 2wd w/ 2657516 tires Slightly larger. I pulled a 3 horse gooseneck from east ga to eastern kentucky over monteagle TN and hand calculated 13.75. My truck does not have the lie o meter anyway. I did not run the crap out of the truck the whole time, but it work pretty hard over the hills. I maintained a speed of 55-60. I cannot remember the size of our tanks but I usually get 475 miles out of a tank if I run it until the light comes on. Thats not towing. I only do it once a month or so to get a feel for how truck is doing. Its been a year since I went on a long tow to use all the fuel but i regularly tow cars locally and it may only drop the total mileage 50-75 miles depending on what weight i towed. My truck is nowhere near as nice as a lot of the ones on here and definitely not as well maintained. But, I am extremely happy with the mileage it gets for its size and ability.
If that is not the case, i'd say something is wrong unless u have mega tires. My truck is a stock extd cab 2wd w/ 2657516 tires Slightly larger. I pulled a 3 horse gooseneck from east ga to eastern kentucky over monteagle TN and hand calculated 13.75. My truck does not have the lie o meter anyway. I did not run the crap out of the truck the whole time, but it work pretty hard over the hills. I maintained a speed of 55-60. I cannot remember the size of our tanks but I usually get 475 miles out of a tank if I run it until the light comes on. Thats not towing. I only do it once a month or so to get a feel for how truck is doing. Its been a year since I went on a long tow to use all the fuel but i regularly tow cars locally and it may only drop the total mileage 50-75 miles depending on what weight i towed. My truck is nowhere near as nice as a lot of the ones on here and definitely not as well maintained. But, I am extremely happy with the mileage it gets for its size and ability.
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Senior User
Joined: Jul 2011
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From: Baytown, TX
Well i think it was the stop and go traffic with that giant wind blocker of a deer stand sittin on it. filled up 3 times on the way there (~300 miles) and made it back on one tank. Thanks for the help. I think im still gonna check that EBP sensor just in case. Thanks again to everyone.
Fleet Mechanic
Joined: Jul 2003
Posts: 1,815
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From: Houston
Well i think it was the stop and go traffic with that giant wind blocker of a deer stand sittin on it. filled up 3 times on the way there (~300 miles) and made it back on one tank. Thanks for the help. I think im still gonna check that EBP sensor just in case. Thanks again to everyone.
I'd run a few tanks through it and see what mpg you are really getting.
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Elder User
Joined: Jun 2007
Posts: 705
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From: Sandia Park, NM
I was getting about 6mi to the gallon one time (empty) and pulled in to a truck stop to have the mechanic look at it. He was not on duty yet, but some old boy told me to put HEET additive in. I told him my "water in fuel" light was not on and his reply was "You're only out 5 bucks if it doesn't work." Well, within 25 miles or so it worked. So.......maybe try a $5 bottle of HEET water separator?
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