How often to change oil on Mazda cx9?

For a Mazda CX-9, it's generally recommended to change the engine oil every 5,000 to 7,500 miles, depending on driving conditions and the type of oil used. If you use synthetic oil, you may be able to extend the interval to around 7,500 miles. Always refer to the owner's manual for specific recommendations based on your vehicle's model year and driving habits. Regular checks of the oil level and condition are also advisable.