2003 Subaru Legacy Owner's Manual - Page 384

12. Reinstall the cover under the oil filter. 13. Pour engine oil through the filler neck. Oil capacity (Guideline): 2.5 liter models: 4.2 US qt (4.0 liters, 3.5 Imp qt) 3.0 liter models: 5.9 US qt (5.6 liters, 4.9 Imp qt) The oil quantity indicated above is only a guideline. The necessary quantity of oil depends on the quantity of oil that has been drained. The quantity of drained oil differs slightly depending on the temperature of the oil and the time the oil is left flowing out. After refilling the engine with oil, therefore, you must use the dipstick to confirm that the level is correct. 14. Start the engine and make sure that no oil leaks appear around the filter's rubber seal and drain plug. 15. Run the engine until it reaches the normal operating temperature. Then stop the engine and wait a few minutes to allow the oil drain back. Check the oil level again and if necessary, add more engine oil. B Recommended grade and viscosity CAUTION Use only engine oil with the recommended grade and viscosity. Oil grade: ILSAC GF-3, which can be identified with the new API certification mark (Starburst mark) or API classification SL with the words "ENERGY CONSERVING" (if you cannot obtain the oil with SL grade, you may use SJ grade "ENERGY CONSERVING" oil). These recommended oil grades can be identified by looking for either or both of the following marks displayed on the oil container. 11-12