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What is the difference between Castrol Edge FE and SN?

1 Answers

RiverMarie

07/29/25 9:21am

Motor oil FE refers to containing the latest titanium fluid formula, while SN refers to the oil grade. The titanium fluid series of motor oils all belong to the SN grade. The following are the differences between Castrol Edge FE and SN: 1. Different nature: Motor oil FE contains the latest titanium fluid formula and does not belong to the category of oil grades. For example, SN refers to the oil grade. 2. Different grades: In 5N, S represents lubricating oil for gasoline engines, and N represents the grade. The grades are arranged in the sequence of the 26 English letters, with the highest currently being grade N. 5W to 30 FE has no grade. 3. Different viscosity: The number before W represents the flow viscosity under low-temperature conditions. The smaller this number, the better the low-temperature fluidity of the motor oil, and the better the protection for the engine when the vehicle starts. The number after W is the viscosity of the oil at 100°C. The higher the number, the higher the viscosity, and the better the protection for the engine under high temperatures.

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