Really poor mileage

banshee695 · Jan 30, 2014

I have a 07 f250 had the stock exhaust on it when I got it truck was completely stock 72k miles. I took the exhaust off and went straight pipe or all the right reasons. But I had to bring it in to the dealership and forgot about it. So the warranty company wouldn't fix the problems until I put another muffler and cat on it. Well a long story short I don't remember the mileage before all this but now all I am getting is 9.4 mpg thats hand calculated and digital. Stock air filter except for the aftermarket exhaust and an edge cts programmer. It doesn't matter if the truck is on stock or on level 4 tune all it gets is the same in the 9 mpg area. I no other guys with them getting them in the teens in the city. I just can't figure out whats going on with my truck. Anyone else having or had problems like this? Any and all information would be greatly appreciated. Just don't know what else to do.

sootie · Jan 31, 2014

when is the last time the air filter and fuel filters were changed?

banshee695 · Jan 31, 2014

About 6 months ago

whitetailreflex · Jan 31, 2014

Any wierd smoke? Fuel leaks?

04cr450 · Jan 31, 2014

Any break calipers sticking? Is it running rough? If so injectors could cause bad fuel mileage for sure. Get a contribution test just to make sure they are all firing correctly

banshee695 · Feb 2, 2014

No no weord smoke. It had a fuel leak under the hood thats what I brought it into the dealership for. They fixed that. No break calipers sticking either checked those as well. Gonna have to try and get one of those test done. Where can you get one at.

banshee695 · Feb 2, 2014

It only runs rough on really cold mornings and maybe for less than a min then it goes normal

whitetailreflex · Feb 4, 2014

Also somethin simple that could affect mpgs, tire pressure.

MrOneEyedBoh · Feb 4, 2014

Yeah true, dont go too high as it will make the tread not "flat" and bulge in the center thus creating more wear in the center of the tire than the outsides

whitetailreflex · Feb 4, 2014

MrOneEyedBoh said:
Yeah true, dont go too high as it will make the tread not "flat" and bulge in the center thus creating more wear in the center of the tire than the outsides

And too low will cause more resistance

banshee695 · Feb 4, 2014

I try and keep all my tires at 70 lbs

GROSSpolluter · Feb 7, 2014

I have a 6.4 and I've noticed worse milage too. I'm thinking it's the winter blend fuel.

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SSpeeDEMONSS · Feb 7, 2014

GROSSpolluter said:
I have a 6.4 and I've noticed worse milage too. I'm thinking it's the winter blend fuel.

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We don't have winter blend here.

Garrett

probably getting paid at work to post this from my POS phone

GROSSpolluter · Feb 7, 2014

SSpeeDEMONSS said:
We don't have winter blend here.

Garrett

probably getting paid at work to post this from my POS phone

You sure?? I've noticed it's a different color than normal. I always go to the same place by my house.

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SSpeeDEMONSS · Feb 7, 2014

GROSSpolluter said:
You sure?? I've noticed it's a different color than normal. I always go to the same place by my house.

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I never got any winter blend down here. My mileage also never went down. That includes fueling up in the AV and on the way to Fresno during winter.

Garrett

probably getting paid at work to post this from my POS phone

banshee695 · Feb 7, 2014

We dont heave winter blend fuel in new orleans. But its not just doing the winter this happens even in the summer.

Jarrod B · Feb 8, 2014

What were you getting with the stock exhaust ?

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banshee695 · Feb 9, 2014

I really dont remember it was a while ago. But I wanna say it was around 13 or so give or take a few. I no on the interstate running 70 it gets between 18.5 and 20 thats running empty