The Ridgeline’s 3.5-liter V6 requires 0W-20 full-synthetic engine oil. This standard helps maximize performance, efficiency, and engine protection for normal driving conditions.
For the 2021 Ridgeline, Honda specifies 0W-20 synthetic oil and an approximate capacity of 5.5 quarts with a new filter. Always verify exact specifications in your owner's manual or with a Honda dealer, as regional variations or special editions can influence the precise requirements.
Recommended oil type and capacity
The following details summarize the official oil requirements you should follow for routine maintenance:
- Viscosity: 0W-20
- Oil type: full-synthetic engine oil
- Capacity: about 5.5 quarts (with filter)
- Standards: API SN or newer; ILSAC GF-6 (or newer)
Sticking to these specifications helps ensure proper lubrication, cold-start protection, and compatibility with the vehicle’s maintenance schedule. If you’re unsure about your local market’s exact spec, consult the owner’s manual or your local Honda service center.
DIY oil-change considerations
If you plan to change the oil yourself, here are the essentials you’ll want on hand before you start:
- 0W-20 full-synthetic motor oil
- About 5.5 quarts of oil
- New oil filter compatible with the Ridgeline
- Basic tools (oil filter wrench, funnel, drain pan, rags)
Using the right oil and a fresh filter is crucial for maintaining the Ridgeline’s performance and keeping the oil-drain intervals consistent with Honda’s recommendations. If you’re unsure about the process, professional service is a reliable option.
Additional notes
Always refer to the official owner's manual for your specific vehicle configuration and region. Some markets or special editions may have slight variations in oil recommendations or service intervals. When in doubt, contact a Honda dealer or certified technician for guidance.
Summary: For a 2021 Honda Ridgeline, use 0W-20 full-synthetic engine oil, about 5.5 quarts with a new filter, and ensure the oil meets API SN or newer and ILSAC GF-6 standards. Following these specifications supports longevity, efficiency, and warranty considerations.


