2009 BMW X3: What is the oil type and capacity?

The engine capacity of Your 2009 BMW X3 iS6.9 quarts when the oil is changed with the filter. 5w-30 synthetic motor oil is recommended. Synthetic oil is by far better for performance. It protects the engine due to lower levels of friction. Synthetic oil keeps engines cleaner. When oil travels through the engine, it picks up debris and deposits from tiny fragments of dirt and tiny slivers of metal which damage engines. It is recommended to change Your oil every 7,500 miles or 1 year, whichever comes first. You can extend Your engine life, get better gas mileage, and have better performance if You change Your oil regularly.