Nitrogen for refilling tires is becoming more available.
According to Get Nitrogen Institute, tires filled with nitrogen instead of regular air reportedly increase gas mileage, wear longer, experience less corrosion and maintain more consistent air pressure. Places that use nitrogen to fill and refill tires have become numerous, as more and more people are requesting nitrogen for their tires.
Tire centers nationwide use nitrogen to fill tires. They can sell a new tire and fill it or top off a tire brought in to them. Tire centers may charge a significant fee to fill a tire with nitrogen.
New cars are available with nitrogen-filled tires. When you purchase the tires with the car, you can usually fill them at the dealer free of charge. The dealership may also fill any new tires purchased there with nitrogen. Used-car dealers may also have the capacity to fill tires with nitrogen, and they may or may not charge a fee to do so.
Some discount superstores with automotive centers have nitrogen for tires. Again, they may sell the tires and fill and refill with nitrogen for free, or they may fill a used tire for a fee.