just an update .. well finaly got a full tank ran threw the the truck after all the deletes . going buy the overhead it from 12.2 up to 18.5 i got almost 550 miles on this tank light is on and it says 40 miles to empty lol . so i know the number are not that spot on but it truly is a major in crease and a lot more power ..

 

they do run alot different after the delete's. I ran 357 miles of hilly, secondary roads and in town driving and hand calculated 17.85 mpg, and the overhead was reading 18.1, I think that is pretty close.
The biggest thing I've noticed, is on my '03, when you let off the fuel, the truck would roll freely, gain speed on the downhills, before the deletes, when you let off the go pedal this truck would loose speed, and after the deletes, it also rolls freely. Amazing how restrictive that garbage in our exhaust systems are!!!

 

Just did a 1000 + mile round trip in my deleted 2010, hilly terrain to mountains, headwind half the return trip, crosswind both trips most of the way.
18.0 going
17.55 return.
Pretty good considering the conditions.

 

ya thats good in my book

 

Its real nice to save our non renewable resources!

My truck weighs in at just over 9000 pounds...its large.
If I can discipline myself to stay below 65 mph I can hit 19 mpg all day long.
I have seen some 20-21 mpg's and that is in the mountains where my average speed is below 60...probably more like 55.
70 get me 17-17.5
75...16 and falling.
I am kind of accustomed to putting along at 60-65 but it sure is nice knowing I can haul butt when I want to.

My towing mpg after deletes matches my empty highway mpg before the deletes!