What Is The Difference Between Gasoline Engine Oil And Diesel Engine Oil?
In general, diesel engine oils of the same viscosity grade are more viscous than gasoline engine oils. If the same viscosity grade diesel engine oil is used in a gasoline engine, the following problems will occur:
1. The engine temperature is too high: the viscosity of the diesel engine oil is greater than that of the gasoline engine oil, the friction is large, causing the engine to heat up, and the temperature rise will accelerate the deterioration of the oil, and the oil life will be reduced.
2. Increase the wear of low temperature start: the viscosity of the oil is too large, and the oil is too slow when the engine starts at low temperature, especially in the cold weather. At this time, although the oil pressure is high, the pumping performance of the oil is poor, and dry friction occurs, and dry friction is the main cause of engine wear.
There is a difference between the two oil additives: the same volume of diesel engine oil contains more additives
Clean Dispersant: Since the diesel engine produces more soot and more by-products in combustion, more detergent dispersants are required. This additive has two main functions: neutralizing the acid and cleaning the engine. internal.
Antioxidant: The sulfur content of diesel oil is larger than that of gasoline. This harmful substance will form sulfuric acid or sulfurous acid during the combustion process. Together with the high temperature and high pressure exhaust gas, it will enter the oil sump to accelerate the oxidation and deterioration of the oil. Therefore, the diesel engine oil It is necessary to add more anti-oxidation additives to make the oil more alkaline. If there is acid gas intrusion, it can play a certain neutralization effect, so that the oil does not oxidize and deteriorate too quickly. Gasoline engine oil does not have such strict requirements in this regard.
Anti-corrosion additive: The compression ratio of diesel engine is more than twice that of gasoline engine. Parts are subject to high temperature, high pressure and impact much more than gasoline engine. Therefore, some parts are made of different materials, and different materials have different corrosion resistance. Therefore, the amount of anti-corrosion additives is not the same!
Exhaust and catalytic exhaust purification systems are different
Diesel engines are different from catalytic converters for gasoline engines. More anti-wear agents are added to the diesel engine oil, so diesel engine emissions have higher requirements for the purifier, and the diesel purifier has been specially treated to deal with this problem. If diesel engine oil is used on a gasoline engine, it will cause problems for the gasoline engine's exhaust gas purifier.