The 2018 Acura RDX uses 0W-20 synthetic motor oil, with an oil capacity of about 5.1 quarts including the filter. Use Acura Genuine Motor Oil or any brand that meets the 0W-20 viscosity and API SN or newer specification.
Recommended oil specification for the 2018 Acura RDX
The RDX’s 3.5-liter V6 is designed for full-synthetic 0W-20 motor oil to optimize cold-start protection, fuel economy, and engine wear. The factory fill and service intervals assume synthetic 0W-20. The typical capacity is about 5.1 quarts with the filter. For best results, use a high-quality 0W-20 synthetic that meets API SN or newer, and ILSAC GF-6 or newer where applicable. Always refer to the owner’s manual for the exact spec and to confirm any special requirements for your vehicle.
Oil capacity and maintenance intervals
The engine holds roughly 5.1 quarts of oil when you include a new oil filter. Typical oil-change intervals for normal driving are about every 7,500 miles or 12 months, whichever comes first, with more frequent changes under severe driving conditions or heavy use. Your Acura’s maintenance minder will indicate the appropriate interval for your vehicle.
Note: If you live in extreme temperatures or you drive under heavy conditions (towing, dusty environments), consult the manual or a dealer for the recommended interval.
What to look for on the oil bottle
To ensure you are using the correct type, check the bottle for the right viscosity and approvals:
- Viscosity listed as 0W-20
- API certification mark (SN or newer)
- Suitable for gasoline engines and ILSAC GF-6 (or newer) compatibility
- Formulated as synthetic motor oil
Using oil that meets these specs helps protect the engine and maintain warranty coverage. Always avoid using thicker or non-synthetic oils unless the manual explicitly allows it.
Where to source the oil and filter
Choose products that meet the 0W-20 specification. Options include Acura Genuine Motor Oil 0W-20, or other reputable brands that advertise API SN or newer and GF-6 compatibility. Use a matching Acura oil filter and a new crush washer for the drain plug if needed. If you’re unsure, consult an authorized Acura service center.
Summary
For a 2018 Acura RDX, the recommended oil is 0W-20 synthetic, with an oil capacity of about 5.1 quarts including the filter. Use Acura Genuine Motor Oil or another synthetic 0W-20 that meets API SN or newer. Change the oil according to the maintenance minder, typically around 7,500 miles under normal driving, and follow more frequent intervals in severe conditions. Always verify the latest specification in your owner’s manual.