While my car was getting checked, I noticed a brochure in the Service Dept. extolling the virtues of using nitrogen to fill your tires...more stable, less leakage, longer tire life, etc.

Four tires filled for only $59.00. Gimmick? Good deal?
Seems to me, if this is so beneficial, Audi should fill the tires for free. I mean, how much does a damn tank of Nitrogen cost?

Bob

While my car was getting checked, I noticed a brochure in the Service Dept. extolling the virtues of using nitrogen to fill your tires...more stable, less leakage, longer tire life, etc.

Four tires filled for only $59.00. Gimmick? Good deal?
Seems to me, if this is so beneficial, Audi should fill the tires for free. I mean, how much does a damn tank of Nitrogen cost?

Bob
BMW ask $100. If you change your tires in Costco - free.

If it's free, why not? But if you check your tire pressures regularly any supposed benefit from nitrogen shouldn't make enough of a difference to justify the cost. Besides, good old compressed air is 78% nitrogen as it is...

Skip the desiger air, unless you drive a race car or fly an airplane :)

2nd, give it a miss. Air is about 78% nitrogen anyway. It has larger molecules than oxygen, is less inclined to expand with heat and absorbs shocks better. They also maintain that it is quieter. Max gain still under 20% if their machine is perfect anyway. Over time (a lot of time) the oxygen leaks through rubber so each time you top up you increase the proportion of nitrogen anyway.