Quote:
Originally Posted by FSETH
My tire place put nitrogen in my Toyo's when I had my tires replaced a few years back. I would have never asked for it, but I have noticed that even after two years and 30,000 miles, I have only had to top off the pressures once or twice to maintain spec. Also, the tire shop that installed the tires offers free checks and top ups, so there was no extra cost.
As you said, performance benefits on the street are nill, but I do see how it could be a slight safety benefit to someone who doesn't check their air pressure as much as they should. Especially an SUV.
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I had the same experience with my now retired Mercedes. Had nitrogen put into the Conti tires when car was new, and didn't have to have any top up whole two years I was driving it. But if you do have a leak, or lose some pressure somehow, you cannot top up nitrogen fill with regular air.