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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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#1
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.
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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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#2
Tue, March 10th, 2009, 03:16 PM
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my truck was getting between 12 and 15 with the stock tune...I ran one tank through on level one with the gryphon and I was beating on my truck, got 17.3...if I baby it it will see 18-19
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 2004 STX 4x4, 2.5''AS, AAL, 18x9 Eagle 178, 325 60R18 Nitto TG, Magnaflow SIDO Catback, 20% tint, XLT Power windows, locks, and mirrors, XLT cluster, FX4 steering wheel, PIE, Bushwacker's, XLT overhead console, Gryphon
Last edited by bjp207; Tue, March 10th, 2009 at 08:12 PM.
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