The answer to this depends on your tire pressure. For most passenger vehicles, with recommended pressures of 32 to 35 psi, it’s OK to use more than 93.4 percent nitrogen in your tires, but that’s all you need to gain all the benefits you’ll read about on this site. For tires that have a recommended pressure of 100 psi or more, the nitrogen purity should be 98%. Higher pressure tires require higher purity to balance partial pressures with the outside air.

• Bridgestone/Firestone
• Ford Motor Co.
• Air Products

While nitrogen will help you maintain proper pressure, you should still check your tires on a regular basis and/or as recommended by the tire manufacturer.

Nitrogen's larger size decreases the rate at which it permeates through the tire, keeping the tire correctly inflated for a longer time.

It's not about the nitrogen, it's about reducing oxygen and moisture. Oxidation can damage the tire and it's components, as well as the wheel. The rate of oxidation increases as the tire heats during use. Compressed air also contains moisture which increases oxidation and pressure fluctuation. 

While nitrogen will help you maintain proper pressure, you should still check your tires on a regular basis and/or as recommended by the tire manufacturer.

Nitrogen works in any tire and will work great in the tires you already have. There’s no need to buy new tires; you already have everything you need to start using nitrogen today… 

While nitrogen will help you maintain proper pressure, you should still check your tires on a regular basis and/or as recommended by the tire manufacturer.

We recommend that you use nitrogen in your tires whenever possible, but if you run into a situation where you can’t get it, no problem. Go ahead and “top off” or completely fill your tires with air. Later, you can go back to the tire dealer who inflated your tires with nitrogen for a refill. 

While nitrogen will help you maintain proper pressure, you should still check your tires on a regular basis and/or as recommended by the tire manufacturer.

The average cost to fill a tire can vary widely, anywhere from $3-10 per tire, depending on several variables such as tire size and pressure (larger and higher pressure tires require more nitrogen and longer purge/fill times). In addition to this, many tire dealers choose to bundle nitrogen with other services making the cost per tire higher, while some charge less (or nothing) per tire if you purchase tires from them.

You may use the Nitrogen Locator on the home page of our website www.getnitrogen.org to locate a dealer near you. They will be able to give you a firm quote on what it will cost to fill your specific tire size, along with any special services they may offer with the nitrogen.

Get Nitrogen Institute is able to list only those dealers that are currently members of the organization. New dealers are joining every week, so please keep checking the Nitrogen Locator periodically to find a dealer in your area.

Yes! Tires are still covered under warranty when nitrogen is used as the inflation medium. Using nitrogen has no effect on the manufacturer’s warranty for the tire.

No! Nitrogen as an inflation gas has no affect on the TPMS sensors. The sensors will read compressed air and nitrogen the same. The Tire Pressure Warning light should not be on if your tires are properly inflated with nitrogen to the manufacturer’s recommended pressure.

There is no conversion factor necessary for filling tires with nitrogen vs. air. Simply inflate tires with nitrogen to the manufacturer’s recommended PSI rating.

You may simply add nitrogen to a tire already filled with air. However, in order to reap the full benefits of nitrogen tire inflation, you need to achieve the desired level of nitrogen purity (GNI recommends 93.4% for passenger tires and 98% for truck tires) and remove any moisture in the tire. To do this it is necessary to first purge the tire of the existing air, down to 3psi, and then refill the tire with nitrogen. This purge/fill cycle may sometimes need to be repeated to achieve optimum results.

Get Nitrogen does not recommend over-filling a tire. The tire should always be inflated to the manufacturer's recommended pressure. While over-filling the tire may provide a slight increase in purity, a double purge will provide the same result without over-filling the tire.