im glad you saw a measureable amount in gas mileage improvement some people have reported that 2-3 miles a gallon improvement i think it's just too much of a headache cause of how each car seems to be erratic until it settles down after the bigger injector upgrade but most people want to add them for performance gains and it isnt gonna happen unless you have a bad injector or two on a n/a or like i said adding more forced induction or nos...