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post #1 of 11 Old 01-12-2011, 04:38 AM Thread Starter
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bad mpgs?

i cant figure out why my truck would be getting such bad gas mileage. runs great but just seems i cant drive anywhere b4 its on empty again. and ideas or suggestions of what i can do. its a early 99 7.3 mods include bully dog chip k&n drop in filter, full 4" exhaust, and prob a few other things im not sure about. thanks for any help
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post #2 of 11 Old 01-12-2011, 05:04 AM
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What were you getting for mileage before versus current? I was getting around 17 this summer and now I'm down to 14. But I'm in central Michigan and I contribute a large amount of the decrease to warm up/high idle time and anti-gelling additives in the fuel.

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DIY intake - 4" Straight pipe - HPX - CAT ELC - 203 t stat - billet t stat housing - coolant filter - dual alt radiator hose - 12V Air compressor - 5 gallon air tank - Air line quick connects - AIR HORNS!

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post #3 of 11 Old 01-12-2011, 05:55 AM Thread Starter
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well i just bought the truck a few months ago and pretty much just now got it going. had fuel leak, and a few other problems took a 6" lift off and put a 4" and im just now starting to drive it some it cant be getting better than 12. i just feel it should be getting better
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What were you getting for mileage before versus current? I was getting around 17 this summer and now I'm down to 14. But I'm in central Michigan and I contribute a large amount of the decrease to warm up/high idle time and anti-gelling additives in the fuel.
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post #4 of 11 Old 01-12-2011, 06:27 AM
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i just drove mine 200 miles on the freeway with my econo tune on, I only got 10.4 mpg???? wtf so frustrating

2002 F-250 7.3
Banks intake
Banks 4" monster exhaust turbo back
DP tunes
Issopro guages
leveling kit
35" bf a/t
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post #5 of 11 Old 01-12-2011, 06:40 AM Thread Starter
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for real thats how i feel. i havnt actually checked the mpgs but have only drove 200 and something miles and im bearly above 1/4 tank. i thought my gas 250 was bad but now its feeling like the gas got a little better
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i just drove mine 200 miles on the freeway with my econo tune on, I only got 10.4 mpg???? wtf so frustrating
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post #6 of 11 Old 01-12-2011, 06:59 AM
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Not a whole lot can be done here. Winter fuel blends are about 20% less efficient so mileage will go down. Any lift will decrease fuel mileage as well.

What size tires are you running?
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post #7 of 11 Old 01-12-2011, 07:50 AM Thread Starter
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35 12.50s . but i did play in the snow some so i know that hurt it some but still figured it would be getting better than a 5.4 f250 i had.
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Not a whole lot can be done here. Winter fuel blends are about 20% less efficient so mileage will go down. Any lift will decrease fuel mileage as well.

What size tires are you running?
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post #8 of 11 Old 01-12-2011, 08:09 AM
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yup, those tires will cut back on mileage. Are you sure your speedo is correct? Have you compensated for tire size?
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post #9 of 11 Old 01-12-2011, 08:22 AM
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my 6.0 has the same problem i bought it back in august and was getting 20 atleast now im down to around 13 or 14. i just made myself a winter cover for the radiator today out of some heavy canvas tarp because i couldnt keep it warm and couldnt justify $150 winter front for it. ill post back later this week and ill let you know if it got any better.
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post #10 of 11 Old 01-12-2011, 08:31 AM
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Quote:
Originally Posted by mxfever090 View Post
What were you getting for mileage before versus current? I was getting around 17 this summer and now I'm down to 14. But I'm in central Michigan and I contribute a large amount of the decrease to warm up/high idle time and anti-gelling additives in the fuel.

I like the 6.4 style tip you have on your truck


2004 F250 6.0 EXTENDED CAB LONG BOX
4" TURBO BACK DYNOMAX
K&N INTAKE
EDGE JUICE W/ ATTITUDE
17" EAGLE ALLOYS W/ 285/75R 17 BRIDGESTONE DUELER A/Ts
DICAD SOLUTIONS EGR DELETE
HONED INTAKE ELBOW
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