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The 2009 Mitsubishi Lancer's 2.0L 4-cylinder engine requires 4.3 liters of Mitsubishi Genuine Full Synthetic 0W-20 oil, but it can also use 5W-30 or 5W-20. It is recommended by the manufacturer to change the oil and filter every 7,500 - 10,000 miles when using synthetic products, and every 3,000 - 5,000 miles when using conventional oil. Synthetic oil offers better lubrication, a longer service interval, and improved performance in cold weather compared to conventional oil. Using oil with lower viscosity helps maintain proper engine lubrication and reduces friction among essential mechanical components. Branded lubricants have been found to offer up to twice the protection against corrosion compared to aftermarket alternatives. The cost for an oil change and filter replacement for the Mitsubishi Lancer typically ranges from $115 to $130 for parts and labor.
For the 2009 Mitsubishi Lancer, the recommended oil is SAE 5W-20.