Can Gasoline Cars Use Diesel Engine Oil?

[VanHope]

Gasoline cars cannot use diesel engine oil. Engine lubricating oils are categorized into gasoline engine oil and diesel engine oil. Although both gasoline and diesel engines operate under high temperature, high pressure, high speed, and high load conditions, there are significant differences between them. Diesel engines have a much higher compression ratio—more than twice that of gasoline engines—and their main components endure much greater high temperature, high pressure, and impact than gasoline engines, leading to differences in the materials used for some parts. Diesel engine oil formulations include additional anti-corrosion additives to form a protective film on bearing surfaces, reducing corrosion and enhancing wear resistance. Gasoline engine oil does not require such high anti-corrosion properties. If used in a diesel engine, the bearings may develop spots, pitting, or even flaking, and the oil will quickly become dirty, potentially leading to bearing seizure and shaft damage.