Mazda CX-9
Data verified by Nick Marchenko, PhD
Maintaining the engine oil in your Mazda CX-9 is crucial for optimal performance and longevity. This SUV offers five engine options across its production years from 2007 to 2022, including the Duratec 35 (3.5L V-6) and the Duratec 37 (3.7L V-6), both requiring 5.5 quarts of 5W-20 oil. The newer PY-VPTS Turbo (2.5L I-4) engine, available from 2016 to 2022, uses 5.1 quarts of 5W-30 oil. Regular oil changes are essential to ensure your engine runs smoothly and efficiently.
In addition to oil capacity, it's important to keep an eye on coolant levels. The Duratec engines have varying coolant capacities, with the Duratec 37 requiring up to 13.6 quarts in some years. By adhering to the recommended maintenance schedule and using the correct oil viscosity, you can help prevent engine wear and maintain the performance of your Mazda CX-9 for years to come.
Mazda CX-9 Oil Capacity
| Engine | Oil Capacity | Viscosity | Coolant | Years |
|---|---|---|---|---|
| Duratec 35 Duratec 3.5L The Duratec 35 engine has a displacement of 3.5L V-6. The power output is 240 hp with a torque of 223 lb-ft. | 5.5 qt | 5W-20 | 11.7 qt | 2007 |
| Duratec 37 Duratec 3.7L The Duratec 37 engine has a displacement of 3.7L V-6. The power output is 302 hp with a torque of 278 lb-ft. | 5.5 qt | 5W-20 | 11.7 qt | 2008 |
| Duratec 37 Duratec 3.7L The Duratec 37 engine has a displacement of 3.7L V-6. The power output is 302 hp with a torque of 278 lb-ft. | 5.5 qt | 5W-20 | 12.8 qt | 2015, 2014, 2013, 2012, 2011 |
| Duratec 37 Duratec 3.7L The Duratec 37 engine has a displacement of 3.7L V-6. The power output is 302 hp with a torque of 278 lb-ft. | 5.5 qt | 5W-20 | 13.6 qt | 2010, 2009 |
| PY-VPTS Turbo Skyactiv Skyactiv G The PY-VPTS Turbo engine has a displacement of 2.5L I-4. The power output is 250 hp with a torque of 320 lb-ft. | 5.1 qt | 5W-30 | 10.5 qt | 2022, 2021, 2020, 2019, 2018, 2017, 2016 |
Mazda CX-9 – Frequently Asked Questions
How many quarts of oil does the Mazda CX-9 take?
The Mazda CX-9 oil capacity varies by engine: Duratec 35: 5.5 qt; Duratec 37: 5.5 qt; Duratec 37: 5.5 qt; Duratec 37: 5.5 qt; PY-VPTS Turbo: 5.1 qt. Always confirm the exact capacity for your specific engine before an oil change.
What type of oil does the Mazda CX-9 use?
Oil viscosity depends on the engine: Duratec 35, Duratec 37, Duratec 37, Duratec 37: 5W-20; PY-VPTS Turbo: 5W-30. Check your owner's manual for the correct spec for your specific engine.
What is the coolant capacity of the Mazda CX-9?
The coolant capacity for the Mazda CX-9 varies by engine: Duratec 35: 11.7 qt; Duratec 37: 11.7 qt; Duratec 37: 12.8 qt; Duratec 37: 13.6 qt; PY-VPTS Turbo: 10.5 qt. Use the coolant specification listed in the owner's manual for your engine variant.
What type of oil does the Mazda CX-9 use?
The Mazda CX-9 typically uses 5W-20 oil for the Duratec 35 and Duratec 37 engines, while the PY-VPTS Turbo engine requires 5W-30 oil.
How many quarts of oil does the Mazda CX-9 take?
The oil capacity for the Mazda CX-9 varies by engine. The Duratec 35 and Duratec 37 engines require 5.5 quarts, while the PY-VPTS Turbo engine requires 5.1 quarts.
How often should I change oil in a Mazda CX-9?
It is generally recommended to change the oil in your Mazda CX-9 every 5,000 to 7,500 miles, depending on driving conditions and oil type.
What is the coolant capacity of the Mazda CX-9?
The coolant capacity for the Mazda CX-9 varies by engine, with the Duratec 35 requiring 11.7 quarts and the Duratec 37 needing up to 13.6 quarts in some models.
Does the Mazda CX-9 need synthetic oil?
While synthetic oil is not required, it is recommended for the Mazda CX-9, especially for the PY-VPTS Turbo engine, to enhance performance and protection.
What happens if I use the wrong oil viscosity in my Mazda CX-9?
Using the wrong oil viscosity can lead to inadequate lubrication, increased engine wear, and potential overheating, affecting overall performance.
What is an oil life monitor and how does it work?
An oil life monitor tracks the engine's operating conditions and calculates when an oil change is necessary based on factors like mileage and driving habits.
Can I mix synthetic and conventional oil?
While it is possible to mix synthetic and conventional oil, it is not recommended as it can reduce the effectiveness of the oil and compromise engine protection.
How do I know if my Mazda CX-9 has an oil leak?
Signs of an oil leak include oil spots under the vehicle, a burning oil smell, or a drop in oil levels on the dipstick.
What causes excessive oil consumption?
Excessive oil consumption can be caused by worn piston rings, valve seals, or gaskets, leading to oil burning or leaking.
Should I check my oil when the engine is hot or cold?
It is best to check your oil when the engine is cold, as this provides a more accurate reading of the oil level without the effects of heat expansion.
What is the difference between an oil change and a flush?
An oil change involves draining old oil and replacing it with new oil, while an oil flush cleans the engine by removing sludge and deposits before new oil is added.