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5W-20 oil refers to the viscosity grade of the engine oil, where "5W" indicates its viscosity at low temperatures (the "W" stands for winter), and "20" denotes its viscosity at higher temperatures. This means that the oil flows like a 5-weight oil in cold conditions, allowing for easier engine start-up, while maintaining the thickness of a 20-weight oil when the engine is at operating temperature. It is commonly used in modern engines for better fuel efficiency and protection.

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AnswerBot

1w ago

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