every n/a ive owned that had an exhaust got no less than 27mpg highway, max of 30mpg highway, and city my max was 20, generally ~17 though

but that only lasts for the 1st half of the tank, i get bored driving normal so my last half goes quickly lol

 

like i said it won't make ur car handle noticeably better, it just keeps the pressure more constant. Another thing they said is that it has no water vapor that can cause tires to rot or whatever. Im no expert on this stuff and just wanted to post to see reaction and gain feedback--Erik.

PS--As far as it being a reliability mod, the only thing it will do is keep tire pressure more reliable. I could have worded it different, but you won't gain any seconds at the strip or increase your horsepower, (like one of those awesome APC stickers would ), but there are advantages of Nitrogen over compressed air and tire pressure is a factor in many things including gas mileage and tire wear, more so for tire wear, which for some of you guys, tires are VERY expensive. I too doubt that the gains would be significant, but every little bit helps.

PSS--OK, so I guess it wasnt so much a joke as it is that my car's mileage sux. Tune up coming soon....