2008 F-450 King MPGs (tunner, DFF delete)

[F450Harley]

Hey Gunnz ! I got the Minni Max on mine with the delete and I have the same experience. My MPG got worse (not that I care ) in most cases except on long trips running it on hot damn, ( I get an average of 12-13). Im not an expert , but Im sure from ALL the money spent on ANY aftermarket mod/products 0.2% goes towards MPG .They are Not intended to improve MPG .They have improved the performance on mine ( a HELL of a lot . I LOVE IT) I have had nothing but diesel trucks since 1990. 1984 GMC 3500 SW w/garrett turbo ( Stolen in 2002.Never found it).2001 FORD F350 DRW all stock ( Sold it in 2005 ). 2003 DODGE 3500 DRW man.6 speed w/Banks Big Hoss ( Sold in 2008) . 2006 FORD F350 DRW Harley w/Banks Big Hoss ( Sold in 2012 w/231K mls ) . 2010 FORD F450 Harley ( still have it) . ALL I mentioned above I NEVER remember my MPG improve

[travisH3]

also what is your low boost fueling set at and what shift strategy. I have heard lowering the fueling will help especially if you have it on 5. and shift schedule, if you run low, it will shift sooner to keep rpms down, with your truck being geared low you can run the low shift schedule pretty easy. i run s1 low and s1 medium. just depends