I was invited to test my truck in a mpg test tht diesel power mag was doing today there was i belive 7 trucks from diffrent years make and set up. we Left fom Down town LA and headed up the 101 to pismo at a very aganizing pace of between 59-63 mph The end result was 27.2 mpg for my truck it just proves tht driving a little slower if you can bare it can get you some serious mpg. my truck was set up as i daily drive and tht includes my race tune in my normal driving is between 75-80 mph and about 18 mpg so just by slowing down I Picked up some serious mpg.