The 2008 Scion xB, powered by the 2.4-liter 2AZ-FE engine, requires SAE 5W-30 motor oil and holds about 4.7 quarts of oil with the filter change. Both conventional and full-synthetic oils that meet API SL or newer are suitable. Always verify the exact specification on the hood label or in the owner's manual for your vehicle's market and configuration.
Engine and oil specifications
The xB’s 2AZ-FE engine is a four-cylinder powerplant that relies on clean, properly graded oil to keep moving parts protected and to maintain efficiency. The standard oil capacity is approximately 4.7 quarts when you replace the filter. The recommended viscosity is 5W-30, chosen to perform well across a broad range of temperatures. For the API service category, look for oil labeled as API SL or newer, and ensure it meets the vehicle’s service requirements. Your best reference is the owner’s manual or the oil cap/sticker under the hood for the exact spec for your car.
Oil capacity
Oil capacity, including a new filter, is about 4.7 quarts. If you’re only draining and refilling the oil without changing the filter, the amount needed will be slightly less. After refilling, recheck the level with the dipstick to reach the correct mark.
Viscosity and API specs
The primary recommendation is 5W-30 oil. It should meet API SL or newer standards. Depending on your market, climate, or driving conditions, you may encounter other grade suggestions in the manual, so always confirm on the cap or in the official documentation for your specific vehicle configuration.
Choosing the right oil and when to change it
You can use conventional oil or a synthetic or synthetic-blend that meets the API specification for the engine. For typical driving, 5W-30 is the standard viscosity in North America. Oil-change intervals vary by oil type and driving conditions: conventional oil is commonly changed around every 5,000 miles (about 8,000 kilometers), while synthetic oils can extend to roughly 7,500–10,000 miles (12,000–16,000 kilometers) depending on use and the maintenance program. Always follow the maintenance minder and the owner’s manual for your exact schedule.
DIY maintenance tips
When performing an oil change yourself, start with a warm engine and a parked car on level ground. Use a new drain plug gasket, replace the oil filter, and pour in the correct amount of 5W-30 oil. After filling, wait a moment and check the dipstick to ensure the oil level sits between the min and max marks. Dispose of used oil responsibly at a recycling facility. If you prefer not to do it yourself, a quick service at a shop will ensure proper torque on the drain plug and accurate oil filling.
Summary
For a 2008 Scion xB, the recommended oil is SAE 5W-30 that meets API SL or newer, with an oil capacity of about 4.7 quarts including the filter. Both conventional and synthetic oils are acceptable, and oil-change intervals should follow Toyota’s maintenance guidance based on driving conditions. Always verify the exact specification in the owner’s manual or on the hood label, as regional variations can occur.