Please choose the correct ending to complete the given sentence: Cars & Other Vehicles: [header] How to improve your gas mileage and save money [title] Use common sense in your driving habits to reap immediate reductions in fuel consumption, wear and tear on your vehicle, tires and brakes, thus expense. [substeps] Accelerate smoothly and gently when leaving intersections and stop signs. It is inconsiderate of other drivers and even contributes to congestion at intersections, to dawdle once the light turns green.

Ending1: Wear neutral gear when cruising on the gas line. Be aware of your direction in navigating around the other vehicles. Ending2: Don't drive without checking mirrors before merging onto or viewing the horizon. This can lead to the visual inconvenience of a gas light switched off, resulting in " shing " of the gas needle accident. Ending3: If you are in the front-wheel drive position, lean over the wheel so that your window is lowered. Put your back foot in first and the front foot in second. Ending4: But it isn't necessary to hit the gas with a heavy foot either. The harder your engine has to work, the more gas you burn.

Answer format: ending1/ending2/ending3/ending4