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The 2008 Toyota Sienna exclusively came equipped with a 3.5 L V6 engine across all trim levels, leaving no other motor options. This engine necessitates the use of synthetic 5W-30 motor oil. With an oil capacity of 6.4 US quarts including the filter, expect to spend roughly $30 to $45 on fluids if you're doing the oil change yourself. The oil drain plug has a 14mm head size and requires 22 ft-lbs of torque for removal.
The specified engine oil for the 2008 Toyota Sienna is full synthetic motor oil with an SAE 5W-30 rating.
The Toyota Sienna requires synthetic oil with a weight of 5w 20 for optimal performance.