Please choose the correct ending to complete the given sentence: Cars & Other Vehicles: [header] How to extend the life of your car tires [title] Check your tire pressure weekly. [step] Unscrew the cap on your tire's air intake and hold a tire pressure gauge against it, allowing air to flow out of the tire and into the gauge. All tires on your vehicle should be evenly inflated.

Ending1: [substeps] If you don't know the proper tire pressure for your vehicle, consult with the vehicle owner's manual. Additionally, all tires imprint recommended tire pressure directly onto the tire. Ending2: [substeps] Keep in mind that tire pressure can vary widely from vehicle to vehicle. Factors such as usage, installation of turning plates or late hours of operation can keep your tire from properly inflated. Ending3: Tires that are too inflated can cause a sudden burst of gas and cause serious damage to your car. Accordingly, your tire pressure should always be checked by a certified mechanic. Ending4: [title] Perform back-to-start tasks. [step] If you're running a distance of less than 2 mph (1.1 km/h) on a winding road, make sure to press the gear shift hard as if you were making a timed back-to-start.

Answer format: ending1/ending2/ending3/ending4