What grade is Audi's dedicated engine oil?

1 Answers
MacKira
07/30/25 4:36am
Audi's dedicated engine oil is Castrol, specifically a 5W40 oil with an SM grade. Below is some knowledge about the functions of engine oil and precautions for oil changes: Functions of engine oil: Engine oil is extremely important for the engine. Many car enthusiasts refer to engine oil as the blood of the engine. Without engine oil, the engine cannot operate normally. Engine oil performs six major functions within the engine: lubrication, cleaning, buffering, rust prevention, heat dissipation, and sealing. Precautions for oil changes: Over time, the performance of engine oil degrades, so it needs to be replaced regularly. If engine oil is not changed for a long time, it will accelerate engine wear. During each oil change, the oil filter should also be replaced. When replacing the oil filter, always choose genuine products from reputable brands, as the oil filter affects the lifespan of the engine oil. When changing the oil, ensure the old oil is completely drained before adding new oil.
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