The quickest way to impove your gas mileage

The Quickest Way To Impove Your Gas Mileage

Tires that are not at the correct air pressure will affect the rolling resistance of your vehicle. Just one under inflated tire can increase  rolling resistance. This requires more energy from the engine, which   decreases your fuel economy.

According to the Department of Energy, you can increase your fuel  economy by about 3.3 percent if you keep your tires inflated properly.  If you have to use snow tires in the winter or deep tread tires for off  road, take them off and replace with a regular tire if you are not going  to use them for any length of time. These types of tires can cost you  up to 4% of your fuel efficiency.

Another study was conducted by the United States Transportation  Research Board of the National Academy of Sciences, titled “Special Report 286 Tires and Passenger Vehicle Fuel Economy“. To summarize, they concluded that “for conventional passenger tires, an increase in  inflation pressure from 24 to 29 pounds per square inch (psi) will  reduce rolling resistance by 10 percent. For a tire inflated to pressures between 24 and 36 psi, each drop of 1 psi leads to a 1.4  percent increase in its rolling resistance. The response is even greater for pressure changes below 24 psi. (p.46)”

Improper inflation also puts unnecessary stress on your tires and can  result in excessive or uneven wear. When this happens, you reduce  the ability of your tires to do their job. It will also result in them not  lasting as long as they should. At a minimum, you’ll need to buy tires  sooner. At worst, you could end up in an accident.

You should buy an air pressure gauge. Spend a few dollars and pick one up at  your local auto parts store or in the automotive section of a  department store. Most gas stations and all tire dealers have one that  they might  let you borrow.

Your recommended air pressure is usually listed on a label adhered to the driver’s side doorjamb. The psi number noted on the sidewall of  your tires is the maximum cold pressure of the tire and is not  necessarily the proper inflation level for your car. If you have replaced  your tires with tires from a different manufacturer, be sure to adhere  to the new tires guidelines, not what is on the label.

Tire pressure is affected by temperature. Identically inflated tires will  show different pressures if one has been driven and one has not. The  “hot” tire that has been driven will show higher pressure than the  “cold” tire that has not been driven. It is important to understand this  difference between hot and cold pressure.

Tire pressures should be checked when your vehicle’s tires are  “cold.” Cold pressure is the pressure in the tire after it has been  sitting for several hours and not driven. Mornings are a good time to  check tire pressures, after the vehicle has been sitting overnight.

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