bad gas mileage?
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Joined: Dec 2008
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bad gas mileage?
My '03 250 s/c with a 5.4 has been averaging about 230miles per tank. Thats about 9.6mpg not towing anything, driving like a grandpa. My buddy with the same exact truck is averaging around 12-13mpgs. His is completely stock. I recently purchased mine and it has headers, K&N intake and exhaust. Im not sure if its chiped out or anything.
Where should I start?
The truck has 112,000 on the ticker. Should I replace the plugs, injectors, fuel filter? any ideas?
Thanks in advance!
Where should I start?
The truck has 112,000 on the ticker. Should I replace the plugs, injectors, fuel filter? any ideas?
Thanks in advance!
Post Fiend
Joined: May 2006
Posts: 10,007
Likes: 4
From: Central Florida
I agree. I always change out the Fuel Filter, o2 sensors, Oil, and most other fluids. Since you have over 100k, I would definitely do the plugs. Spark Plugs maybe rated for 100k miles, but reality is that 75k miles is pushing it. o2 sensors are supposed to be changed around 60k miles, so they are due even if they aren't the originals.
Senior User
Joined: May 2008
Posts: 186
Likes: 1
My '03 250 s/c with a 5.4 has been averaging about 230miles per tank. Thats about 9.6mpg not towing anything, driving like a grandpa. My buddy with the same exact truck is averaging around 12-13mpgs. His is completely stock. I recently purchased mine and it has headers, K&N intake and exhaust. Im not sure if its chiped out or anything.
Where should I start?
The truck has 112,000 on the ticker. Should I replace the plugs, injectors, fuel filter? any ideas?
Thanks in advance!
Where should I start?
The truck has 112,000 on the ticker. Should I replace the plugs, injectors, fuel filter? any ideas?
Thanks in advance!
Hotshot
Joined: Mar 2007
Posts: 10,101
Likes: 40
From: Pa
The other guys have it. Clean MAF, replace plugs and COP boots, replace fuel filter and replacing the O2s would be a good idea. Once the plugs get past 50k miles they start going south and are more prone to a misfire. You could have the fuel injectors cleaned at a dealer or just run a tank of fuel injector cleaner. I usually run a tank with fuel injector cleaner every year.
Not calculating gas mileage during the winter works also.
Not calculating gas mileage during the winter works also.
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Senior User
Joined: Dec 2007
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From: Lower Hudson Valley, N.Y.
My '03 250 s/c with a 5.4 has been averaging about 230miles per tank. Thats about 9.6mpg not towing anything, driving like a grandpa. My buddy with the same exact truck is averaging around 12-13mpgs. His is completely stock. I recently purchased mine and it has headers, K&N intake and exhaust. Im not sure if its chiped out or anything.
Where should I start?
Where should I start?
Comments?
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Senior User
Joined: Jul 2007
Posts: 274
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From: Freeville Ny
my 01 f250sd 4x4 5.4 averages around 10-12 depending on if I tow. Its stock and I just did the plugs about 6 months ago. I am getting between 390-420 miles per tank. I have a 38 gallon tank though from what I understand some of the sd had smaller tanks.
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Freshman User
Joined: Dec 2008
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I have a 2002 f250sd 7.3L Powerstroke. Im only getting about 240miles to the tank. about 9.5ave miles/gal. is there anything special i can do to make that alittle better. I know its a big engine but any tricks to make that mileage any better would be awesome.
Senior User
Joined: Jun 2008
Posts: 162
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i have a 06 f250 5.4L an when i got it was gettin around 10.2 for the first 6 months i had it an then after adding a fitch fuel i was gettin 11.4 an after i did the intake gettin 11.7 if that helps any i no many people say its how u drive as well i try not 2 let it go above 2500 rpms if posable
Elder User
Joined: Aug 2003
Posts: 621
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From: near pittsburgh pa
I hope your not running the tank empty,,, your math aint adding up for me.
Cross-Country
Joined: Nov 2008
Posts: 86
Likes: 7
From: Ashburn VA
I also have a 03 F250 SD 4X4 5.4L with 3.73 rear. Around town I avereage 12 to 12.5; on the highway the best I have ever done is 14.6. If I put the camper on the truck, the mileage drops to around 9.6 on the highway. The truck is all stock.
I tell you this to use for comparison. It was said earlier, it appears you need to do some maintenance (i.e. plugs, filters, etc.).
I tell you this to use for comparison. It was said earlier, it appears you need to do some maintenance (i.e. plugs, filters, etc.).
Junior User
Joined: Nov 2007
Posts: 91
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I have an 01' F-250 with the V-10. I have 271,000 on it and all stock but the e-Bay y-pipe. I also am running BFG Rugged Trail A/Ts(Stock Size).
I usually average 12 right now in the winter and in the summer about 13-14.
Your plugs, fuel filter, O2 sensors, injectors, MAF, throttle body, and cylinders may need to be cleaned or replaced respectively. I would run a can of Seafoam in the tank and in the crankcase. Not to mention your trans may need to be flushed which would reduce friction depending on the state of your oil. Also while you're at it, I'd change differential fluids and transfer case.
I usually average 12 right now in the winter and in the summer about 13-14.
Your plugs, fuel filter, O2 sensors, injectors, MAF, throttle body, and cylinders may need to be cleaned or replaced respectively. I would run a can of Seafoam in the tank and in the crankcase. Not to mention your trans may need to be flushed which would reduce friction depending on the state of your oil. Also while you're at it, I'd change differential fluids and transfer case.