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The recommended oil type and capacity for a 2015 Toyota Highlander is 0w-20 with 4.6 quarts. It's important to change the oil regularly to prevent engine issues. Typically, changing the oil every 5,000 to 10,000 miles is a good practice. Using high-quality oil is essential for smooth engine operation, as poor-quality oil can lead to engine failure. Common signs of bad oil include a burning smell, which should be addressed promptly to avoid potential car damage. Neglecting oil changes can result in poor gas mileage and unusual engine noises like knocking.
In 2015, the Toyota Highlander requires synthetic motor oil with a viscosity rating of SAE 0W-20. The 2.7L 4-cylinder engine can be filled with 4.6 quarts of oil, while the 3.5L V6 engine has a larger oil capacity of 6.4 quarts.