The 2021 Acura RDX requires 0W-20 synthetic engine oil that meets ILSAC GF-5 and API SN (or newer). The engine holds roughly 4.5 quarts per change. Use Acura Genuine motor oil or an equivalent that matches these specifications for optimal performance and warranty compliance.
Oil specifications and approvals
To ensure you meet factory requirements, here’s a quick guide to the oil’s viscosity, standards, and compatibility.
- Viscosity: 0W-20 synthetic
- Standards: ILSAC GF-5 and API SN (or newer)
- Approved brands: Acura Genuine Motor Oil or any reputable synthetic that meets GF-5/SN
- Temperature performance: 0W-20 provides good cold-start protection and fuel economy across typical U.S. climates
- What to avoid: do not substitute with non-approved viscosities such as 5W-30 unless specifically directed by Acura for your climate
In short, use a high-quality synthetic 0W-20 that satisfies GF-5 and SN and is approved for Acura engines.
Capacity and maintenance guidelines
Knowing the rough capacity and maintenance cadence helps you plan oil changes and avoid overfill or underfill.
- Oil capacity (with filter): approximately 4.4–4.5 quarts
- Recommended change interval: about every 7,500 miles (12 months) under normal driving; more frequent under severe conditions
- Maintenance checks: monitor the oil level with the dipstick and top up if necessary between changes
- Oil filter: replace with every oil change
Always verify exact figures in your owner's manual or with an Acura dealer, as minor variations can occur by model year or trim.
Practical tips for selecting oil and performing a change
When shopping for oil, look for the 0W-20 viscosity and GF-5/SN certification on the label. Follow all manufacturer warnings and ensure the correct quantity is used to avoid overfill.
Summary
The 2021 Acura RDX uses 0W-20 synthetic oil meeting ILSAC GF-5/API SN or newer, with an approximate capacity of 4.4–4.5 quarts per oil change. Use Acura Genuine oil or a high-quality equivalent that meets these specs, and follow the recommended maintenance schedule as outlined in the owner's manual.
What oil does a 2021 Acura RDX use?
Oil Grade: API*
| Viscosity: | 0W-20 (All TEMPS) |
|---|---|
| Capacity: | 4.8 litres (with filter). After refill check oil level. |
| Capacity: | 4.4 litres. w/of. After refill check oil level. |
| Torque: | 30 ft/lbs (Oil Drain Plug) Install a new washer on the drain bolt. Only use an OE drain plug. |
How many quarts of oil does a 2021 RDX take?
5.1 quarts
Capacity: 5.1 quarts (with filter). After refill check oil level.
Why does Acura use 0W-20 oil?
0W-20 synthetic oil is thinner and more fluid than higher weight motor oil, which means that it can flow more easily through your engine. This allows for better lubrication and reduces friction between moving parts, which can help prolong the life of your engine.
Does the Acura RDX need full synthetic oil?
Your regular Acura RDX oil change is one of the most important routine services you'll get, but what is the recommended Acura RDX oil type? The Acura RDX oil type is full synthetic motor oil and it is crucial that you don't stray from that recommendation.