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What is the SN grade of engine oil?

1 Answers

LeSimon

07/30/25 2:56am

SN is the second-grade engine oil, while SP is currently the highest-grade engine oil. Engine oil grades are represented by a combination of two letters. The "S" series represents oil for gasoline engines, with general specifications ranging from SA to SP. Each subsequent letter indicates better performance than the previous one, and the further back the letter is in the alphabet, the higher the quality grade. In international brands, engine oil grades are mostly above SF. The following are characteristics of engine oil: 1. Lubricity: The ability of engine oil to reduce friction, slow down wear, and prevent metal sintering under various conditions is called the lubricity of the engine. 2. Low-temperature operability: The performance of engine oil to ensure easy starting and reliable oil supply under low-temperature conditions is called the low-temperature operability of engine oil. 3. Viscosity-temperature characteristics: The property of lubricating oil to change viscosity due to temperature changes is called viscosity-temperature characteristics.

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What do the + and - signs next to the D gear in an automatic transmission mean?

Automatic transmission D gear next to the + and - represents shifting gears up and down. The following is the relevant introduction: 1. Principle explanation: The + and - next to the D gear are the manual mode in the automatic transmission. The so-called manual mode is to add electronic control devices to the automatic transmission, so that the transmission follows the operator's instructions to shift up and down. 2. Scope of application: The "+" sign is the manual transmission upshift, and the "-" sign is the manual transmission downshift. During driving, the gear lever can be moved to the manual mode to shift gears manually. This manual function can be used when you need to force the gear to stay in a low gear during long uphill or downhill driving.

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Which turn signal to use when changing lanes to the right?

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