Even just a pound or two of underinflation in your tires can be a problem. Why, though? There are several reasons.
Proper tire inflation can give you as much as a 3.3 percent increase in fuel economy or even more. Remember that you can’t really detect low air pressure from looking at a tire until it gets really low (under 20 psi or so). Remember also that air will migrate out of a tire through the valve stem and the tire sidewalls just through normal wear; you should get a quality tire gauge (not the ones built into the hose at the gas station) and check the tire inflation at least once a month. Air expands when hot, so remember to check tire pressure when the tires are still cold.
Tire pressure isn’t at the forefront of most drivers’ minds, but it’s still important. Having to replace a prematurely worn-out set of tires or to dump more gas into your fuel tank seems like a pretty dumb way to spend money, doesn’t it? Do yourself a favor and be mindful of your tire inflation levels!
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