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Here's a way an American might rephrase the question: "Hey, for a 2003 Subaru Forester, what kind of oil does it need and how much does it hold?
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The 2003 Subaru Forester exclusively featured a 2.5L 4-cylinder engine across all models with no alternative motor available. This engine requires 4.2 US quarts of oil including the filter, using a synthetic blend 5W-30 oil type. To maintain optimal engine health, it is recommended to change the oil every 5,000 to 7,500 miles. The oil drain plug is 17mm in size, and if a torque wrench is used, it should be set to 25 ft/lbs. In the absence of a torque wrench, a 17mm socket with hand tools is sufficient for the task.
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Subaru recommends using different types of oil based on the temperature for the 2.5L box-4 engine in the 2003 Subaru Forester. The preferred viscosity is 5W30 for temperatures below 104 degrees Fahrenheit, while 10W30 or 10W40 is recommended for temperatures above -4 degrees Fahrenheit. For warmer weather above 95 degrees Fahrenheit or for demanding use like towing, 30 weight, 40 weight, 10W50, 20W40, or 20W50 oils are advised. Regardless of viscosity, always use 4.2 quarts of oil.
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