Review on Innovative Performance Programmer Chevrolet Silverado Replacement Parts for Engines & Engine Parts by Steve Atchley

I just bought a 95ft 6.5L Chevy K2500 diesel and never checked how many mpg it had, when it was first bought. I went ahead and bought this performance chip hoping to increase my fuel economy. I've driven a truck maybe two or three times, maybe four times? and then my wife and niece and my family and our family filled up and drove over 1000 miles i would say mostly interstate and highway and filled up again i calculated just over 20mpg. Like I said I didn't count before, just heard how many mpg was for that truck. So I'm happy with that.