Please choose the correct ending to complete the given sentence: Cars & Other Vehicles: [header] How to increase fuel mileage on a car [title] Set the car tires to the proper inflation. [step] Properly inflated tires can reduce fuel consumption by up to 3 %. Your tires also lose about 1 psi per month, and when the tires are cold (e.g., in the winter), their pressure will decrease due to the thermal contraction of the air.

Ending1: [substeps] Take your tires apart before putting them back together. Reattaching your tires all together will increase fuel mileage, though it takes time, as will changing prices. Ending2: It is recommended to check tires at least monthly, preferably weekly. Having properly inflated tires will also help you avoid uneven wear on the tread. Ending3: [substeps] In order to improve fuel mileage in your car, each tire should have at least 15 psi at a certain rate (e.g. , 110 psi for gallons , 2 psi for miles, and 1 psi for every 120 miles). Ending4: The ratio of engine fuel to ground fuel is 5 psi per 10 psi (4.6 ppm). [substeps] The combined rating of engine fuel to ground fuel may be determined from your car's rating.

Answer format: ending1/ending2/ending3/ending4