The 2009 Accord equipped with the 3.5L V6 uses 5W-20 engine oil as the standard viscosity. It can be conventional, a synthetic blend, or full synthetic, as long as it meets the specification.
Oil specifications for the 3.5L V6
Key requirements when selecting oil for this engine include the correct viscosity, API/ILSAC ratings, and the acceptable oil formats.
- Viscosity: 5W-20
- API service: SN or newer
- ILSAC grade: GF-5 or newer
- Oil types: conventional, synthetic blend, or full synthetic
Sticking to these specs helps ensure proper lubrication, fuel efficiency, and engine longevity.
Oil capacity and filling guidance
The 3.5L V6 in the 2009 Accord holds about 5.5 quarts (roughly 5.2 liters) of oil with the filter. When performing an oil change, fill to the recommended level and recheck with the dipstick to avoid overfilling.
Maintenance intervals and tips
General intervals vary by oil type and driving conditions. Conventional oil typically requires changes around every 3,000–5,000 miles, while synthetic or synthetic blends are often extended to about 5,000–7,500 miles, or per the vehicle’s oil-life monitor. Always follow the owner’s manual and the oil-life indicator for your specific vehicle.
Tips for selecting the right oil
Look for 5W-20 viscosity, API SN or newer, and ILSAC GF-5 or newer. This ensures compatibility with Honda engines and supports OEM performance standards.
Summary
In short, the 2009 Honda Accord V6 uses 5W-20 engine oil, with conventional, synthetic blend, or full synthetic options that meet API SN and ILSAC GF-5 or newer specs. The engine capacity is about 5.5 quarts with a filter; follow maintenance intervals appropriate for your oil type and driving conditions, and verify the exact spec on your owner’s manual or oil cap for your market.