2006 Honda Accord Owner's Manual - Page 200
2006 Honda Accord Manual
Page 200 highlights
Adding Engine Oil ENGINE OIL FILL CAP ENGINE OIL FILL CAP Recommended Engine Oil Oil is a major contributor to your engine's performance and longevity. Always use a premium-grade 5W-20 detergent oil displaying the API Certification Seal. This seal indicates the oil is energy conserving, and that it meets the American Petroleum Institute's latest requirements. 4-cylinder models 6-cylinder models Unscrew and remove the engine oil fill cap on top of the valve cover. Pour in the oil slowly and carefully so you do not spill any. Clean up any spills immediately. Spilled oil could damage components in the engine compartment. Install the engine oil fill cap, and tighten it securely. Wait a few minutes, and recheck the oil level. Do not fill above the upper mark; you could damage the engine. 204