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Should the CS75 use 5W30 or 5W40 engine oil?

1 Answers

SerenityAnn

07/30/25 3:04am

The CS75 should use 5W30 engine oil. It is recommended to use the original SL-grade 5W30 engine oil. 5W30 has better fluidity than 5W40, which helps reduce fuel consumption and dissipate heat from the engine more quickly. The "W" stands for winter, and the smaller the number before it, the better the oil's low-temperature fluidity, indicating a lower usable environmental temperature and better engine protection during cold starts. For example, 5W40 can be used in environments with temperatures below 40 degrees, while 5W30 can be used in environments with temperatures below 30 degrees. The difference between 5W30 and 5W40 engine oil is that higher viscosity oil leads to higher fuel consumption and louder engine noise, but it provides better sealing performance. Therefore, the choice of oil viscosity should also consider the age of the vehicle. Newer engines with tight component clearances should use lower viscosity oil, while vehicles with significant engine wear should use higher viscosity oil. Precautions for using engine oil: Choose oil based on the engine's requirements, ensuring it matches the engine. Multi-grade oil is recommended due to its advantages in fuel efficiency, long service life, and high efficiency, providing better protection for the engine.

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