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The 2004 Toyota 4Runner is equipped with either a 4.0 L V6 or 4.7 L V8 engine, both of which require SAE 5W-30 Synthetic Motor Oil for all driving conditions. The oil capacity for the 4.0 L V6 engine is 5.5 quarts with a filter, while the 4.7 L V8 engine holds 6.6 quarts with a filter. The drain plug should be tightened to 30 ft/lbs of torque for the 4.0 L V6 and 29 ft/lbs for the 4.7 L V8 engine during oil changes. Regular oil changes are necessary to maintain engine cleanliness and prevent oil degradation, which typically occurs after a certain mileage interval. Since synthetic oil is used, it is recommended to change it every 7,500 to 10,000 miles along with the oil filter.
The 2004 Toyota 4Runner with the standard 4.0L V6 engine requires 5.5 quarts of synthetic 5W30 oil, while the upgraded 4.7L V8 engine option needs 6.6 quarts of synthetic 5W30 oil.