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Difference Between Engine Oil and Diesel?

1 Answers

LePatrick

07/29/25 4:12pm

Engine oil and diesel have the following differences: 1. Different fuel economy grades. The latest ACEA European lubricant classification consists of three series: A/B series for gasoline and light-duty diesel engine oils; C series for heavy-duty diesel engine oils. 2. The compression ratio of a diesel engine is more than twice that of a gasoline engine. Its main components endure much higher temperatures, pressures, and impacts than those in a gasoline engine, hence some parts are made from different materials. 3. Diesel contains more sulfur 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. Therefore, diesel engine oils require more additives that provide oxidation resistance and maintain a stronger alkaline state.

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