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The recommended oil type and capacity for the 4.0 L v6 engine in a 2015 Toyota 4Runner is 0w-20 and 6.6 quarts. It is crucial to use high-quality oil to keep the engine running smoothly. Neglecting the oil maintenance can lead to various problems, such as engine knocking, engine failure, burning odor, and even potentially catastrophic consequences like engine damage or poor gas mileage. Therefore, it is important to regularly replace the oil every 5,000 to 10,000 miles to prevent any issues with the engine.
To ensure optimal performance of your 2015 Toyota 4Runner, use SAE 0W-20 full synthetic engine oil. The vehicle's 4.0L V6 engine can accommodate 6.6 quarts with the addition of a new filter for smooth operation.