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What kind of engine oil is best for Jetta VS5?

1 Answers

IrisLynn

07/30/25 9:26am

Jetta VS5 uses semi-synthetic engine oil for maintenance, with a viscosity of 5W-40 and a usage amount of 4.0 liters. The oil model can be selected according to the recommendation in the maintenance manual. Engine oil is divided into three types: conventional mineral oil, semi-synthetic oil, and full synthetic oil. The quality grade of the oil is indicated by the first two English letters, such as SJ or SN, and the viscosity grade is represented by the following set of numbers, like 15W-40. The viscosity grade should be selected based on the temperature during the car's usage stage. Below is more information about the three types of engine oil: 1. Mineral oil: Mineral oil is a commonly used lubricant in the market. It is derived from the distillation of petroleum to extract useful substances, such as gasoline and aviation oil, followed by further processing of the remaining base oil. 2. Semi-synthetic oil: Semi-synthetic oil is made from semi-synthetic base oil, which is a product purified from mineral oil through hydrocracking technology. It is a mixture of mineral oil and full synthetic oil in a ratio of 4:6. The purity of semi-synthetic oil is very close to that of full synthetic oil, but its cost is slightly higher than mineral oil, making it an ideal transitional product from mineral oil to synthetic oil. 3. Full synthetic oil: Full synthetic oil is a high-grade product among engine oils. It is derived from ethylene and propylene dispersed from natural gas or gas in crude oil, and then undergoes complex chemical reactions such as polymerization and catalysis to form a lubricating fluid composed of large molecules.

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