The local news has a "problem solvers" report on this today about how it saves you gas..better for the tires and all that...could not find the article on WKMG's web page but found it on a NC news web site.....
What do you all think about this?
Drivers Following New Trend: Filling Tires With Nitrogen
CHARLOTTE, N.C. -- Matthew Struhar fills his cars' tires with nitrogen. NASCAR teams swear by it, airlines stake their safety on it and many drivers are following the growing trend.
"I drive 200 to 300 miles a day. So my tires are always over inflated or under inflated. And that's why I was concerned. I go through tires about once a year," said Struhar.
Some dealers say nitrogen-filled tires -- still fairly rare in Charlotte -- have major benefits over the air in most tires.
"Oxygen has smaller molecules in it, which enables it to escape three to four times faster than nitrogen can," said Costco's Mike Mann.
Mann said every tire sold in the Charlotte Costco warehouse is filled with nitrogen. And although some dealers across the country charge as much as $5 a tire for nitrogen, Costco does it for free.
Either way, experts say, tires filled with nitrogen can save you money by keeping proper inflation pressure longer than a tire filled with air. As a result, your tires wear better, handle better and all that translates into better gas mileage.
Struhar said his gas mileage is 5 percent better since switching to nitrogen.
"I spend almost $11,000 on gas alone for my vehicles and 5 percent is a savings of about $600 a year," he said.
Nitrogen also has another advantage. It doesn't contain moisture, which causes tire rubber to break down over time.
But what if you get a flat tire but don't have access to nitrogen? You can still refill the tire with air, but you won't get the benefits of pure nitrogen unless you put nitrogen back in later.
Keep in mind -- nitrogen can't prevent a valve leak, or stop you from running over a nail. So it's still a good idea to check your tire pressure once a month.
We checked with several other major tire companies in Charlotte. None of them are using nitrogen, but several are considering it.