Putting diesel in a gasoline car can cause symptoms such as engine shaking, black smoke from the exhaust, or even failure to start the engine. Differences between diesel and gasoline: 1. Gasoline is highly volatile, while diesel is difficult to evaporate: Gasoline vehicles emit fuel evaporation pollutants. 2. Gasoline mixes easily with air and does not separate easily: Gasoline molecules are smaller, whereas diesel mixes unevenly with air, inevitably leading to localized oxygen deficiency or excess. When fuel burns at high temperatures with insufficient oxygen, it tends to carbonize and form soot. Diesel combustion also produces some odorous organic gases, which is why diesel engine emissions have a distinct smell. 3. Diesel has higher energy density: Diesel does not require a spark plug and ignites under high pressure, making it more efficient but also heavier and noisier. Gasoline requires ignition, so gasoline engines are smaller and quieter. 4. They smell different: Gasoline has a pungent odor, while diesel has a milder smell. 5. They differ in color: Gasoline is light-colored, while diesel is darker. Diesel is mainly used in trucks; diesel engines rely on compression ignition and operate at relatively low speeds, resulting in lower power compared to gasoline engines and slower vehicle speeds. Gasoline is primarily used in passenger cars; gasoline engines use spark ignition, and their compression ratios are generally lower, typically ranging from 8-11 for naturally aspirated engines and not exceeding 14 for turbocharged ones.
