botibbs

Is it ok to bring tire pressure up in nitrogen filled tires with regular air.

Vette_DD

Yes, because regular air that most Vette owners use has nitrogen in it already.

haljensen

Nitrogen tire fill is a joke.

The air in your compressor is 76% Nitrogen, paying big dollars for closer to 99% nitrogen dosn't make economical sense.

flyeri

It depends on if you believe the sales pitches of those selling nitrogen in tires. If you do believe them you will need to evacuate all air/nitrogen in you tires and replace with pure nitrogen as soon as possible. If you don't believe them just top up with air. It is 78% nitrogen anyway. There are legitimate reasons for using nitrogen but for most drivers there is no need in spending the money. Just keep your tires at the proper pressure.

botibbs

thanks

Boomer111

It is more stable but not worth the cost in my book. I adjust the psi to often with temp changes.

Power Hawk

Compressed air = 76% nitrogen. You will be fine mixing the two.

CSixDude

People misunderstand the advantages of nitrogen use in tires. Yes dry air contains 78% nitrogen. However what folks are overlooking is the water vapor content of normal air. This water vapor expands at a high rate and causes pressure swings. Nitrogen by comparison is much drier so it's pressure remains more constant over a wider temp range. While I don't think I'd pay to have it put in my tires, it does offer some tangible benefits.

RHEACERDAVE

Agree.
FWIW department. For history, I've competed in SCCA since 1984, autocross, time trials and road racing, 7 years of AMA racing before that. The seperation process to get the "pure" nitrogen seperates out moisture, too. Advantage racing, dry air won't expand like moist air. Tire pressures stay fairly constant from leaving pit lane, to taking the checker. We compensate by leaving pits with 4-7 psi lower than optimal, knowing as tire heat up, psi will go up too. I have never asked any of my racing buddies in Arizona, but they probably don't understand the hubbub, since their air is already dry. Down South where we can cut our air in the summer, it really makes one less variable. BTW, I've never used it, nor do I plan to racing or on the street.

EVILFACE

Yea if you are using the car for competition, then 100% nitrogen is the way to go.

For trips to Sonic and waxing in the driveway, regular air it.