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The 2006 Mitsubishi Eclipse GT comes with a choice of either a 2.4 liter 4-cylinder engine or a 3.8 liter 6-cylinder engine. The 4-cylinder engine requires 4.5 US quarts of either 5W-20 or 5W-30 oil along with a filter. The 6-cylinder engine also needs 4.5 US quarts of the same oil options. For optimal performance and maintenance, it is recommended to change the oil and filter every 7,500-10,000 miles or 12 months if using synthetic oil, or every 3,000-5,000 miles or 6 months if using conventional oil. Synthetic oils offer benefits such as improved lubrication for engine parts, longer time between oil changes, and better performance in extreme weather conditions. Thinner viscosity oils move more freely in cold temperatures, protecting engine components and reducing friction and corrosion.
The 2006 Mitsubishi Eclipse GT requires 5W20 oil for optimal performance.
The recommended engine oil for the 2006 Mitsubishi Eclipse is SAE 5W-30.