Nitrogen in tires: how long stays
Filling car tires with nitrogen can help maintain better pressure, as they typically lose less pressure than regular air for up to a year, thanks to its larger molecules that reduce leakage. Tests and studies have shown that nitrogen-filled tires retain their pressure between 35% and 55% better than those with air, with less loss in hot temperatures. However, adding air to a nitrogen-filled tire is safe, since air contains about 78% nitrogen itself, and pressure loss is affected by factors such as temperature, tire condition, and valve. It is recommended to check tire pressure monthly to ensure efficiency and safety. Keep in mind that nitrogen is not a substitute for regular inspections, and its cost and availability are sometimes lower than that of regular air.
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