What grade of gasoline should a car use?

[AshleyAnn]

The grade of gasoline a car should use depends on the type of vehicle: 1. Cars with ordinary naturally aspirated engines can use 92-octane gasoline; 2. Cars with turbocharged engines or higher compression ratios should use 95-octane gasoline; 3. High-end luxury or high-performance cars should use 98-octane gasoline. Gasoline is a volatile, flammable liquid hydrocarbon mixture obtained from the fractional distillation, cracking, or pyrolysis of petroleum. At room temperature, it is a colorless to pale yellow, easily flowing liquid that is difficult to dissolve in water and highly flammable. Mixing different grades of gasoline can lead to incomplete combustion, causing carbon deposits and shortening the engine's lifespan.