Maintaining proper tire pressure is an important part of regular car maintenance. It can improve gas mileage and lengthen the life of tires. Checking tire pressure requires using a tire pressure gauge, which can be found for just a few dollars. The correct tire pressure for a vehicle can be found in the owner's manual or on a label in the car. Having incorrect tire pressure can decrease gas mileage and cause tires to wear out more quickly. Checking and maintaining proper tire pressure only takes a few minutes but provides important safety and performance benefits.