Please choose the correct ending to complete the given sentence: Cars & Other Vehicles: [header] How to choose the right fuel for your car [title] Use diesel fuel if your vehicle is designed for it. [step] Engines designed to run on diesel fuel operate differently than those designed to run on regular gasoline. Diesel engines do not use spark plugs, and instead rely on the compression of the air and fuel to ignite the mixture alone.

Ending1: Diesel fuel can give your vehicle the ability to warm up drastically due to low compression and the higher engine collective. [substeps] It is considered diesel fuel if the fuel on the tank is less than $150 , 000 a year. Ending2: Because of this, diesel fuel is less stable and cannot be used in engines designed for gasoline. Diesel vehicles usually have clear " diesel only " markings on the inside of their fuel doors, and traditional gas pumps won't fit in their filler necks. Ending3: [substeps] Diesel fuel tends to smell strongly of sulfur and rust often because of engine fire. Each engine is different and you should narrow down the range of various fuel types to see what types of fuel were included with your car before choosing your fuel option. Ending4: For the sake of convenience, diesel fuel is necessary when your vehicle is built for air travel. [title] Fuel your vehicle's fuel tank with diesel fuel.

Answer format: ending1/ending2/ending3/ending4