Can Diesel Engine Oil and Gasoline Engine Oil Be Mixed?

[McRuby]

Gasoline engine oil and diesel engine oil cannot be mixed. Here are their differences: Because the working conditions of gasoline engines differ from those of diesel engines: Gasoline has a low ignition point, and gasoline vehicles typically ignite the air-fuel mixture via spark plugs, resulting in lower cylinder pressure. In contrast, diesel vehicles compress diesel fuel through a high-pressure fuel injection pump, which then sprays high-pressure diesel into the cylinder via injectors, leading to higher cylinder pressure, rougher operation, and larger component clearances. Gasoline and diesel vehicles have different requirements for engine oil: Gasoline engine oil needs to be thinner with better fluidity, while diesel engine oil operates under higher pressure and harsher conditions, producing more carbon deposits. It requires stronger cleaning capabilities and thicker viscosity due to larger clearances. Therefore, gasoline vehicles should not use diesel engine oil.