Gas Mileage
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New User
Joined: Apr 2007
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Gas Mileage
I have a 1998 extended cab f150. It has a 6 inch lift, 35 inch tires and the 4.6 liter engine. I am only getting 200 miles per tank of gas at a maximum. usually its about 180 miles per tank. The gas mileage is killing me and I was wondering if there is a problem that needs to be fixed. Does anyone know how to help me out??
Post Fiend
Joined: Aug 2006
Posts: 20,099
Likes: 7
From: Yorkton Sask
what is your rear end gear ratio?? the biggest problem is the 35's. the 4.6l will be working a little harder to turn them, hence using more fuel. the sticker on the inside of your drivers door will give you codes for your rear end, post them here and someone will decipher it for you. if you're running a 3.55, be a good choice to move up to a 3.73 or 4.10...
Hotshot
Joined: Jun 2003
Posts: 12,353
Likes: 4,389
From: SW VA
Originally Posted by 96sherm
if you're running a 3.55, be a good choice to move up to a 3.73 or 4.10...
4.56's are the only way to go....especially with a 4.6L and 35's.
Post Fiend
Joined: Apr 2006
Posts: 12,281
Likes: 1
From: Saskatoon Saskatchewan
Sure did Sherm yeah gears is the major thing and you gotta recalbirate the speedo after bigger tires so you can get the correct mileage also keep your foot out of it if you can i keep my truck under 2k rpm and cant complain about the mileage ther
