Nitrogen inflation for tires
Nitrogen inflation may not be worthwhile for everyone's tires. The main advantage of nitrogen inflation is lower operating temperatures and better retention of pressure, and people using vehicles in extreme conditions stand a good chance of getting more life out of tires filled with nitrogen.
Nitrogen is a colorless, odorless, tasteless, and non-toxic gas that forms about 78% of the Earth's atmosphere. The rest of the atmosphere is 21% oxygen and a few other gases.
The main claims for nitrogen inflation are:
The negatives are:
If you drive about 15,000 miles a year and can get your tires inflated with nitrogen free, then why not do so and make your own test?. Although you shouldn't have to add pressure to your tires as often, it is possible to add air without causing any damage. The problem with doing this is that you would then have to completely re-fill the tire with nitrogen to return to the advantages of using nitrogen. If you can increase your tire mileage by 5,000 miles, the nitrogen is doing it's job.
Companies like Costco have been giving free nitrogen to their customers for some time. Tire Warehouses in the north eastern US offers free top-up service to their customers.
Users who will likely notice the greatest financial gains are people who have to maintain a lot of tires at once, like truck companies, fleet managers, etc.
The rest of us could probably achieve gains by regularly checking tire pressures and acting fast when we see irregular wear patterns. Checking your tires before you drive your car each day won't cost you sixty bucks, which is the price some dealers are charging for filling your tires with nitrogen and it's a good safety habit to develop.
Here's another site to give you a broader picture on the subject:
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