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| 2004 to 2008 F-150 and Mark-LT 4.2L, 4.6L and 5.4L equipped F-150s and Mark-LTs. |
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#6
Fri, February 20th, 2009, 03:20 PM
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A lot of it depends on what what gears you're running. 3.31 or 3.55 geared trucks fare better in the mileage arena and can often see better than 20 MPG with tuning. However, if all he's looking for is fuel economy and he's already at 19.5 MPG now, I doubt there would be a significant enough gain to offset the cost of getting a programmer.
There may be more gains if he does a lot of city driving or mixed driving. If he's got an average number for his day to day, we'll be able to better advise a solution. Take care.
__________________
Bill Cohron - The Mad Doctor   Power Hungry Performance - The ORIGINAL in Ford performance tuning... Since 1997! (678) 890-1110 www.gopowerhungry.com - Home of the Hydra Chip, Minotaur Tuning Software, and the new Orion Reflash System for Navistar! Bring back  Windows™ XP and 7.  Windows™ Vista and Windows™ 8 is a pain in my a$$!  Windows™ 10 is only slightly less annoying!  Windows™ 11 is garbage!  Much to my surprise, I'm actually quite enjoying Linux! 
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