Is It a Problem to Mix a Small Amount of Diesel into a Gasoline Engine?

[LaLily]

If the amount added is very small, there should be no major issue because gasoline engines are spark-ignition engines, while diesel engines are compression-ignition engines. The ignition point of gasoline is lower than that of diesel. However, when the two are mixed, it only results in a lower initial boiling point and flash point of the blended fuel. After the diesel is atomized by the fuel pump and injected into the cylinder, it is compressed and ignited as the piston moves, causing the small amount of gasoline mixed with the diesel to burn and perform work. If the amount mixed is large, it may cause slight engine knocking. Causing Cylinder Scoring: In fact, adding no more than 5% diesel to gasoline generally has no significant impact on a gasoline engine. However, once the proportion of diesel increases, the probability of engine knocking and stalling rises rapidly, which may even lead to severe cylinder scoring. Immediate Engine Shutdown: Park the car in a safe area and shut off the engine immediately, then call the 4S shop to request a tow truck for repairs. At the 4S shop, it will be necessary to drain the fuel, clean the fuel tank and fuel lines, and replace the oil. This approach will minimize the damage.