National Tire Safety Week
Did you know that April 20th thru April 26 is Tire Safety Week? I didn’t but I know about it now.
Tire safety is an important item that largely gets ignored by a lot of people.
I believe it was Mark Donahue that said “your tires are all there is between you and eternity”, or something like that.
When it comes to saving gas, tires are just as important. Under inflated tires reduce your gas mileage by as much as 3% to 4%.
So if you normally get 30 mpg, under inflated tires will reduce your mileage to 28.8 mpg.
The technical reasons are fairly straight forward. Under inflation causes more rolling resistance then a properly inflated or slightly over inflated tire does.
Its like trying to roll a bean bag down a hill vs. a basketball. You can get a bean bag to roll but it takes a lot more effort and constant attention. A basketball will just go with the slightest amount of effort.
I say over inflated because you could over inflate your tires slightly above what the auto manufacturer recommends as long as you do not exceed the maximum pressure that is printed on the sidewall.
You will have to watch your tires carefully for un-even wear. An over inflated tire can wear out in the middle of the tread where an under inflated tire will wear on the outsides. If you see excessive wear lower the pressure a few pounds and continue to watch.
I personally have my tires inflated to 40psi with a maximum of 44psi on the sidewall and there has been no excessive wear at all.
Find out more info about saving money on gas at SippingFuel
Tuesday, April 22nd, 2008
