BUT 38% of all vehicles have at least one Tire under inflated
Consumers should remember that fuel economy is dependant on proper air pressure. Monitoring air pressure regularly, and using proper inflation pressures as directed by the vehicle owner’s manual, is the best route to ensure maximum fuel economy and maximum tire life.
Remember, regardless of temperature, tires lose between 1-2 psi per month. In addition, for every 7 degrees Celsius drop in temperature, a tire will lose another pound of pressure. So a tire left unchecked from the time it was filled in warm June to 35 psi, is down 12psi in cooler November. That under inflation is going to hurt fuel economy, traction, and increase tire wear.