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The 2005 Subaru Legacy requires 4.4 quarts of oil for maintenance. It's important to regularly change the oil, typically every 5,000 to 10,000 miles. Failure to do so can lead to engine issues. Using high-quality oil is crucial for optimal engine performance. Neglecting oil changes may result in problems such as a strong burning smell, which should be addressed promptly to prevent potential accidents. Old or low-quality oil can cause the engine to malfunction, leading to symptoms like engine knocking and decreased fuel efficiency.
Both the 2.5-liter flat-four turbocharged and non-turbocharged engine choices necessitate 4.4 quarts of synthetic oil.