Join Date: Aug 2012
Location: Delmar, NY
Vehicle: 2005 SLK350, 6spd man.
Other Toys: Honda VTR1000F, Yamaha LS2000
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 4 Post(s)
Thanked 17 Times in 17 Posts
Gummi pflege works better than snake oil...
Seriously, nitrogen is better for your tires for several reasons, whether you would notice or not is a different question.
yes air is 78% nitrogen but it is also 21% oxygen. Oxygen will oxidize the rubber over time. At 30 psi this oxidation happens three times faster inside the tire than outside at atmospheric pressure. Many of us drive enough that bi or tri annual tire changes negate this oxidation, but over 4 + years it could degrade the rubber from the inside.
also water vapor is much more soluable in oxygen than nitrogen so there is a greater possibilility for moisture to condense with an air fill than nitrogen.
finally (and now the really esoteric) the thermal coefficients of expansion are slightly different between O2 and N2 so in theory straight N2 will expand at a more consistent rate than a mixed gas like air.
Then again there are those of us who index our plugs, shave webbing down on plastic intake tract, use synthetic brake fluid, etc... its all about what makes you feel good about your ride.