Nitrogen filled tires...tell me about them.

[mazda3kitten]

Bought my used mazda and discovered the tires are filled with nitrogen.
From what i've read it doesn't really sound like it's super beneficial.
Anyone have opinions?

[stevenma188]

Marketing gimmick for tire shop to make extra money off consumers....

Doesn't do anything.

[silverstarmazda]

http://www.torontomazda3.ca/forum/showthread.php?62663-nitrogen-to-fill-up-tire&highlight=nitrogen

http://www.torontomazda3.ca/forum/showthread.php?51910-Nitrogen&highlight=Nitrogen

[Aitch]

Your tires are already filled with 78% nitrogen (air). Really think 20% will make a difference?