badaz907,
If you had a scangauge you might know why you only got 1 mpg better
mine has already paid me back just over the summer
If i could only have one mod - it would be a scangauge
I have used it to teach my self to drive better (I am now one with the truck
)
and it has helped me diagnose problems with engine and transmission
as for the FE
you could be right - might be short hauls costing you
my truck is neg 10-20% FE until warmed up (learned that with a scangauge too
)
I'm sure my issue is an ECU warm up mode
If that is true for you too, you might want to try slowly blocking up the grill