Differences Between Gasoline Engine Oil and Diesel Engine Oil

[SanChloe]

Here are the differences between gasoline engine oil and diesel engine oil: 1. Different fuel economy grades: According to the ACEA European Lubricant Classification Standard, the latest classification consists of 3 series. The A/B series are for gasoline and light-duty diesel engine oils. The C series is for catalyst-compatible engine oils. The E series is for heavy-duty diesel engine oils. 2. Different compression ratios: The compression ratio of diesel engines is more than twice that of gasoline engines, and their main components are subjected to much higher temperatures, pressures, and impacts than gasoline engines. Therefore, the materials used for some components differ. 3. Different sulfur content: Diesel fuel 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 the oxidation and deterioration of the engine oil. Hence, diesel engine oil formulations require more antioxidants and additives to maintain a stronger alkaline state.