WHAT IT DOES: The company makes and distributes NitroFill, a nitrogen tire inflation system, to auto dealers and service centers.

HOW IT WORKS: NitroFill produces nitrogen at the auto service center by separating it from air (which is 78% nitrogen) under low pressure.

WHY NOW: Properly inflated tires are a key to better fuel economy. One of the benefi ts of nitrogen vs. oxygen in tires is that nitrogen leaks out of tires at a slower pace. "It doesn't permeate through the tire," says Jay Lighter, president of NitroFill.

WHAT IT COSTS: Typically $6 to $10 per tire.

WHERE YOU'LL FIND IT: About 80 car dealers and auto service centers in Florida. For locations, go to whynitrofi ll.com.