low mpg imo
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Senior User
Joined: Dec 2004
Posts: 175
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low mpg imo
02 f350, auto, 4x4, 3.73 gears, muffler delete. i just cut out the muffler and figred it would help my mpg. ran a tank thorugh it and i got 13.4. this is aweful. i drive with OD off until 50mph. this tank i have just been driving with OD on the whole time. seems to help but i am not a fan of the way it drives this way now. also when i bought the truck it had an 80hp therminator chip in it from diesel dynamics (now edge i believe). should i take this out and see what it does? how in the hell are some of you getting 17+ mpg out of basically the same truck. the only thing i have left to do is make an air intake, but that wont gain me the mpg i am lookign for.
Hotshot
Joined: Feb 2007
Posts: 10,499
Likes: 10
From: Sterling Heights,Mi
I am sitting right there with you, Well, actually lower. But my driving here in the city is every half mile there is darn light. The only thing that even slightly raised my milage was going to the napa 6637. Nothing, and I mean nothing has changed that YET, I am waiting for my first dozen tank fulls with the DP. I say dozen, because I am having a hardtime not put a gallon or two through the exhaust pipe at take off 
______
Joined: May 2004
Posts: 516
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From: Upstate NY
I have a late 99 F-250, 4x4, ex-cab, sb, 3.73, 285 tires, no mods....yet. I got 15-16 going from upstate NY to New Holland PA in Dec, 08. I ran power service in the white bottle. Been checking my milage now just daily driving and getting 12-13. Still running power service. Waiting to see if it gets any better after the winter fuel is gone. Also going to run power service in the gray bottle (DK).
Hotshot
Joined: Feb 2007
Posts: 10,499
Likes: 10
From: Sterling Heights,Mi
Now see on the highway I can get to around 16.. The best I have seen was 18.5 at 55mph accross the UP.. yeah, I did the speed limit, well close to it, it was really 58.5 mph, but the speedo said 55
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Senior User
Joined: Dec 2004
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i have not turned overdrive off yet once this tank and its seems to be doing better, i also have been keeping my highway speeds down 65-68, nothing more. i am at half a tank with 270 miles. i will see how it goes. i just dont love driving around own with od off, but like i said it seems to help. i am also considering removing the older chip as i see no difference in my 02 than my fathers bone stock 02. i think all it does is use fuel.
