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The 2009 Mitsubishi Outlander is available in different models, each equipped with either a 2.4L 4-cylinder engine or a larger 3.0L V6 engine. Both engines recommend using SAE 5W-20 full synthetic oil, although SAE 5W-30 can be used in emergencies. The 4-cylinder engine requires 4.2 quarts of oil, while the V6 engine requires 4.5 quarts. Even though SAE 5W-30 oil may be cheaper, it has a lower viscosity compared to SAE 5W-20, which can impact engine efficiency in the long run. The difference in viscosity between the two oils at operating temperature (10 units) can lead to premature engine wear and reduce its overall lifespan.
The specified engine oil recommended for the 2009 Mitsubishi Outlander is 5W-20 across all variants. In the 2009 Mitsubishi Outlander ES and SE models, the oil capacity is 4.5 US quarts (4.3 liters), while the 2009 Mitsubishi Outlander XLS and GT models have an oil capacity of 4.2 US quarts (4.0 liters).