TOPSHAM, MAINE - Many motorists seeking to improve their mileage are examining everything — right down to the air in their tires. And for a growing number, plain old air isn't good enough. George ...

When most people inflate their tires, they go with plain old compressed air. It’s cheap, widely available, and works just fine. But there is a pricier alternative: nitrogen-filled car tires. Since ...

with regular air — a mixture composed mostly of nitrogen and oxygen. However, in recent years, a new trend has emerged in the automotive world: inflating tires with pure nitrogen gas. Many tire shops ...

Dear Car Fix: What's the inside answer on nitrogen in tires? I bought a new set of tires at a local dealer and had them nitrogen-filled. After a couple of months, when they seem to lose a couple of ...

The two gases, air and nitrogen, perform similarly in tire operation. The oxygen and water vapor in air do react with the chemical components of the tire, and age it faster than nitrogen does. Water ...