Acura RDX
Data verified by Nick Marchenko, PhD
Maintaining your Acura RDX is essential for optimal performance and longevity, especially when it comes to engine oil and coolant. The 2007–2022 Acura RDX features five engine options, including the J35Z2 3.5L V-6 and K20C4 2.0L I-4. The J35Z2 engine, available in 2013–2015 and 2016–2018 models, requires 4.5 quarts of 0W-20 oil and has a coolant capacity of 7 or 7.8 quarts. The K20C4 engine, found in 2019–2022 models, uses 5.1 quarts of 0W-20 oil and has a coolant capacity of 5.7 or 6 quarts, while the K23A1 2.3L I-4 engine from 2007–2012 requires 5 quarts of 5W-30 oil and 7.4 quarts of coolant.
Regular oil changes and monitoring coolant levels are crucial for maintaining engine health. Always refer to your owner's manual for specific maintenance intervals and oil specifications to ensure your Acura RDX runs smoothly for years to come.
Acura RDX Oil Capacity
| Engine | Oil Capacity | Viscosity | Coolant | Years |
|---|---|---|---|---|
| J35Z2 J-Series J35 The J35Z2 engine has a displacement of 3.5L V-6. It features a bore and stroke of 89 mm × 93 mm. The power output is 268 hp with a torque of 254 lb-ft. It has a redline of 6800 RPM. The compression ratio is 10.5:1. The valve train is 24V SOHC i-VTEC. | 4.5 qt | 0W-20 | 7.0 qt | 2015, 2014, 2013 |
| J35Z2 J-Series J35 The J35Z2 engine has a displacement of 3.5L V-6. It features a bore and stroke of 89 mm × 93 mm. The power output is 268 hp with a torque of 254 lb-ft. It has a redline of 6800 RPM. The compression ratio is 10.5:1. The valve train is 24V SOHC i-VTEC. | 4.5 qt | 0W-20 | 7.8 qt | 2018, 2017, 2016 |
| K20C4 K-Series K20 The K20C4 engine has a displacement of 2.0L I-4. It features a bore and stroke of 86 mm x 85.9 mm. The power output is 272 hp with a torque of 280 lb-ft. It has a redline of 6800 RPM. The compression ratio is 9.8:1. The valve train is DOHC. | 5.1 qt | 0W-20 | 5.7 qt | 2022, 2021, 2020 |
| K20C4 K-Series K20 The K20C4 engine has a displacement of 2.0L I-4. It features a bore and stroke of 86 mm x 85.9 mm. The power output is 272 hp with a torque of 280 lb-ft. It has a redline of 6800 RPM. The compression ratio is 9.8:1. The valve train is DOHC. | 5.1 qt | 0W-20 | 6.0 qt | 2019 |
| K23A1 K-Series K23 The K23A1 engine has a displacement of 2.3L I-4. It features a bore and stroke of 86 mm x 99 mm. The power output is 240 hp with a torque of 260 lb-ft. It has a redline of 6800 RPM. The compression ratio is 8.8:1. The valve train is DOHC. | 5.0 qt | 5W-30 | 7.4 qt | 2012, 2011, 2010, 2009, 2008, 2007 |
Acura RDX – Frequently Asked Questions
How many quarts of oil does the Acura RDX take?
The Acura RDX oil capacity varies by engine: J35Z2: 4.5 qt; J35Z2: 4.5 qt; K20C4: 5.1 qt; K20C4: 5.1 qt; K23A1: 5.0 qt. Always confirm the exact capacity for your specific engine before an oil change.
What type of oil does the Acura RDX use?
Oil viscosity depends on the engine: J35Z2, J35Z2, K20C4, K20C4: 0W-20; K23A1: 5W-30. Check your owner's manual for the correct spec for your specific engine.
What is the coolant capacity of the Acura RDX?
The coolant capacity for the Acura RDX varies by engine: J35Z2: 7.0 qt; J35Z2: 7.8 qt; K20C4: 5.7 qt; K20C4: 6.0 qt; K23A1: 7.4 qt. Use the coolant specification listed in the owner's manual for your engine variant.
What type of oil does the Acura RDX use?
The Acura RDX typically uses 0W-20 synthetic oil for the J35Z2 and K20C4 engines, while the K23A1 engine requires 5W-30 oil.
How many quarts of oil does the Acura RDX take?
The oil capacity varies by engine: the J35Z2 engines take 4.5 quarts, the K20C4 engines take 5.1 quarts, and the K23A1 engine takes 5 quarts.
How often should I change oil in a Acura RDX?
It's recommended to change the oil in your Acura RDX every 7,500 miles or 12 months, whichever comes first, but always check your owner's manual for specific intervals.
What is the coolant capacity of the Acura RDX?
The coolant capacity varies by engine: the J35Z2 engine has a capacity of 7 or 7.8 quarts, the K20C4 engine has 5.7 or 6 quarts, and the K23A1 engine requires 7.4 quarts.
Does the Acura RDX need synthetic oil?
Yes, the Acura RDX is designed to run on synthetic oil, specifically 0W-20 for the J35Z2 and K20C4 engines, which helps improve fuel efficiency and engine performance.
What happens if I use the wrong oil viscosity in my Acura RDX?
Using the wrong oil viscosity can lead to inadequate lubrication, increased engine wear, and potential engine damage. It's crucial to adhere to the recommended oil specifications.
What is an oil life monitor and how does it work?
An oil life monitor tracks your engine's oil quality based on driving conditions and habits. It alerts you when it's time for an oil change, helping to optimize engine performance.
Can I mix synthetic and conventional oil?
While you can mix synthetic and conventional oils, it's not recommended as it can reduce the benefits of synthetic oil and may lead to decreased engine performance.
How do I know if my Acura RDX 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. Regularly checking the oil level can help detect leaks early.
What causes excessive oil consumption?
Excessive oil consumption can be caused by worn engine components, such as piston rings or valve seals, or using the wrong oil viscosity. Regular maintenance can help mitigate these issues.
Should I check my oil when the engine is hot or cold?
It's best to check your oil when the engine is warm but not hot, as this allows for a more accurate reading. Make sure to wait a few minutes after turning off the engine.
What is the difference between an oil change and a flush?
An oil change involves draining the old oil and replacing it with new oil, while an oil flush is a process that cleans the engine by removing sludge and deposits. Flushing is generally not necessary for regular maintenance.