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post #1 of 19 Old 05-20-2009, 09:23 AM Thread Starter
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MPG's?

Alright, so here lately my mpg have begun to suffer dropping from around 16.9 in the city to the mid 15's. I am not understanding why. I cleaned my filter, changed fuel filters and used some BBK diesel injector cleaner. I cannot figure out what it is. I was told that I might be able to update my firmware on my Xcal 3 but havent had any luck with SCT. Anybody got any ideas as to what could be causin this. Oh and I havent put on new tires or changed tire size and I keep my tires properly inflated. i am stuck??????

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post #2 of 19 Old 05-20-2009, 09:34 AM
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I'm lucky to get 12mpg in the city, and barely 16.5 on the highway running 65.

2012 F-150 XLT Ecoboost SuperCrew 6.5' 4x4
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post #3 of 19 Old 05-20-2009, 04:16 PM Thread Starter
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I used to get about 19 on the highway but it is just suffering lately. Also, one more thing how can I fix turbo lag. A buddy of mine has a 6.0 with a bully dog on it and turbo lag is almost non existent. His is 2 years newer than mine but I have driven other 6.0s around that year that have more lag, but not as much as mine.

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SCT 3D decal = +50 hp

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post #4 of 19 Old 05-20-2009, 04:19 PM
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Turbo lag is all in the tuning. Get a good custom tune and you can have almost zero lag.

2012 F-150 XLT Ecoboost SuperCrew 6.5' 4x4
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post #5 of 19 Old 05-20-2009, 07:15 PM
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i get 18-19 runnin 75-80 on the highway and anywhere from 15.5 to 16 in the city depends on how i drive.........have you possibly got new boots? maybe they weigh more lol

1996 ford f-250 7.3 powerstroke, 4x4, auto, sc lb, 140,000, FPR shim mod, straight pipe to a 6" stack
1993 chevy k1500 suburban 6.5 turbo diesel and nv4500 5 spd.....workin out the details
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post #6 of 19 Old 05-20-2009, 07:21 PM
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maybe its the diesel injector cleaner have you changed your oil lately?

05 Single Cab Short Bed
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post #7 of 19 Old 05-22-2009, 06:21 AM
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i wish i was gettin those kinda numbers. 14.3 on the lieometer, runnin 70mph with the cruise on.

05 F350 FX4 Crew, Auto, 6.0, ARP Studs, EGR delete, and Magnaflow Duals, Cage leveling kit, 33x12.5x18 Toyo Open Country MT's.
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post #8 of 19 Old 05-22-2009, 11:49 AM
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14.3 on the lie o meter I get 13.5-14.5 generally last tank was a little hiway with a lot of city got me 15.47. Have you had a dealer visit? Firm ware should not affect milage. The tune might though. Have you been carring more weight possibly?

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post #9 of 19 Old 05-22-2009, 02:02 PM
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I only get thirteen on the highway running about 75, but I am spinning 35" tires on a 20x12 wheel . I wish I could get your so called bad mileage, Ha Ha !


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post #10 of 19 Old 05-22-2009, 02:43 PM
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Is that corrected milage? I would think with 35" tires you would be running a little lower rpm anf get great mpgs. unless you have a lot of lift and really heavy wheel and tire combo. I'm planning on either 33 or 35" tires on stock rims when I get to the steels on my truck. My mpgs are best at 60-65 so I plan on running that rpm but using the tires to get 70-70mph

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2006 f250 4x4
crewcab shortbed
lariat auto
Some tuning, gauges and other assorted non factory dodads
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