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In an American context, the 2012 Toyota Sienna requires 5W-20 oil and holds 4.7 quarts for the 2.7L engine. It's essential to change your oil regularly, ideally every 5,000 to 10,000 miles, to prevent engine problems. Using high-quality oil is crucial for optimal engine performance. Neglecting oil changes can lead to engine issues, such as a burning smell or poor gas mileage. If you hear knocking noises from the engine, address it promptly to avoid potential risks, like engine failure.
The recommended motor oil for the 2012 Toyota Sienna is Toyota Genuine Motor Oil 0W-20 or a similar type. If you can't find SAE 0W-20, you can use SAE 5W-20 as a substitute temporarily, but remember to switch back to SAE 0W-20 at the next oil change. For the 2.7L engine, the oil capacity is 4.7 quarts (4.4 Liters), and for the 3.5L engine, it is 6.4 quarts (6.1 Liters).