That variation in temperature can come from a change in ambient air temperature, having the tire sit in the sun or driving, which heats up the tire and, thus, the air inside. Therefore ...

Also remember that filling your tires with nitrogen almost always costs more than normal air. Next, nitrogen can, in theory, ...

Then the driver should drop into a nearby gas station and grab the air hose ... and then fill up," said Jayamohan. The display will show the driver the pressure for each tire.