Does adding gasoline to a diesel engine have any impact?
2 Answers
Adding gasoline to a diesel engine does have an impact. It can cause severe knocking, which may damage the engine, and lead to insufficient lubrication in the diesel injection system, resulting in wear. Below are the specific differences between diesel engine oil and gasoline engine oil: 1. Oil viscosity: Generally, diesel engine oil with the same viscosity grade is more viscous than gasoline engine oil. 2. Sulfur content: Diesel has a higher sulfur content than gasoline. This harmful substance forms sulfuric or sulfurous acid during combustion, which, along with high-temperature and high-pressure exhaust gases, enters the oil pan, accelerating oil oxidation and degradation. Therefore, diesel engine oil formulations require more additives that provide oxidation resistance and maintain a stronger alkaline state.
I've witnessed several similar incidents, and putting gasoline into a diesel car is absolutely a major issue. Primarily because diesel engines rely on compression to ignite the fuel, whereas gasoline requires spark plugs for ignition—their combustion methods differ. Gasoline doesn't burn completely in a diesel engine, easily leaving carbon deposits that clog injectors and fuel filters, and in severe cases, can damage the fuel pump or pistons. More dangerously, after starting, the engine may experience knocking, emit black smoke, or suddenly stall, increasing the risk of accidents while driving at high speeds. If you realize you've added the wrong fuel, don't panic—immediately turn off the engine and avoid attempting to start or drive the car. Call for a tow truck to take it to a professional shop for handling; they'll drain the tank and clean the system to prevent corrosion. For prevention, always check the pump handle color before refueling—diesel is often labeled with a green tag. Prompt action can avoid repair costs amounting to tens of thousands, so don't risk major losses for minor savings.
