Short answer: Use 5W-20 motor oil (API SN or newer) in the 2009 Honda Accord, with about 4.7 quarts for the 2.4L four-cylinder and about 5.5 quarts for the 3.5L V6. Conventional or synthetic oil is acceptable, though synthetic can offer better protection and longer change intervals depending on climate and driving habits.
Engine options and oil specifications
2009 Honda Accord — 2.4L four-cylinder
Key oil specifications for the 2.4L engine are as follows:
- Recommended viscosity: 5W-20 (SAE)
- API service category: SN or newer
- Oil type: Conventional or synthetic (both acceptable if meeting API 5W-20 and quality standards)
- Oil capacity (with filter): approximately 4.7 quarts (4.4 L)
In practice, this means using 5W-20 oil that meets current API standards, choosing between conventional or synthetic based on your climate and maintenance plan. Always refer to the owner’s manual for the exact capacities and intervals.
2009 Honda Accord — 3.5L V6
Key oil specifications for the 3.5L engine are as follows:
- Recommended viscosity: 5W-20 (SAE)
- API service category: SN or newer
- Oil type: Conventional or synthetic (both acceptable if meeting API 5W-20 and quality standards)
- Oil capacity (with filter): approximately 5.5 quarts (5.2 L)
As with the four-cylinder, use 5W-20 oil that meets API standards. Synthetic oil is often preferred for the V6 in hotter climates or for longer drain intervals, but always follow the manual’s guidance.
Additional guidance on choosing oil type
When selecting between conventional and synthetic oil for your 2009 Accord, consider climate, driving conditions, and maintenance goals. Synthetic oils typically provide better high-temperature stability and cold starts, which can be advantageous in extreme heat or cold and for extended drain intervals if your manual allows them.
Maintenance notes
Always verify the exact oil capacity and specification in your owner’s manual, as there may be slight variations by production date or market. Use a high-quality oil filter and ensure proper disposal of old oil. If in doubt, consult a trusted mechanic or a Honda dealership for the correct specification for your specific vehicle.
Summary
The 2009 Honda Accord uses 5W-20 motor oil (API SN or newer) for both the 2.4L four-cylinder and the 3.5L V6. The approximate oil capacities are 4.7 quarts for the 2.4L and 5.5 quarts for the 3.5L, with both conventional and synthetic oils being acceptable options. Always follow the owner’s manual for exact specifications and interval recommendations.