My Z came with nitrogen in the tires. The tires needed almost no air added for two years, even with large ambient temperature swings. It makes a difference. I didn't pay for it, though.
__________________
2011 MB Touring-Sport-6sp-Nav/GTM TT/FI TT TDX/JTran/Kosmic/Eibach/Hotchkis/SPC/CSF/RPS/SoThatsWhereAllMyMoneyWent
|