986 Forum - The Community for Porsche Boxster & Cayman Owners - View Single Post

thstone · 02-19-2012, 08:44 AM

Over the course of a one-year study using 31 different tire models, Consumer Reports found that the tire pressure in a nitrogen filled tire was maintained by 1.3psi more than an air filled tire. That is an average difference of 0.1psi per month between nitrogen and air. Unless you're racing and maintaining tire pressures to within +/- 0.5psi you'll never notice this difference in tire pressure stability.

Of course, your particular mileage may vary (different tires/wheels combinations along with differing wear will result in varying tire pressure stability), but nitrogen filling is generally worthless in the aggregate.

Reference: Tires - Nitrogen air loss study

02-19-2012, 08:44 AM	#10
thstone Certified Boxster Addict Join Date: Nov 2010 Location: Los Angeles Posts: 7,669	Over the course of a one-year study using 31 different tire models, Consumer Reports found that the tire pressure in a nitrogen filled tire was maintained by 1.3psi more than an air filled tire. That is an average difference of 0.1psi per month between nitrogen and air. Unless you're racing and maintaining tire pressures to within +/- 0.5psi you'll never notice this difference in tire pressure stability. Of course, your particular mileage may vary (different tires/wheels combinations along with differing wear will result in varying tire pressure stability), but nitrogen filling is generally worthless in the aggregate. Reference: Tires - Nitrogen air loss study __________________ 1999 996 C2 - sold - bought back - sold for more 1997 Spec Boxster BSR #254 1979 911 SC POC Licensed DE/TT Instructor Last edited by thstone; 02-19-2012 at 08:51 AM.