Honda - 10W-30 Outboard Engine Oil - 5 QT Bottle - 08232-B99-K80A1. Honda 10W-30 Outboard Engine Oil is formulated for the harsh realities of on-water use-heat, humidity, long run times, and corrosion exposure. This OEM Honda marine oil helps protect internal engine components, supports clean lubrication, and is a smart choice for routine service when you want consistent performance and dependable protection from idle to wide-open throttle. The 5 quart bottle format is ideal for maintenance intervals where you need more oil on hand with less mess.. Key Features. Genuine Honda outboard engine oil for marine use. 10W-30 viscosity for reliable protection across common operating conditions. Helps reduce wear and support smooth, consistent lubrication. Designed to handle extended run time and marine exposure. 5 quart bottle for convenient servicing and shop efficiency. Fitment & Use. Use where 10W-30 is recommended in your Honda outboard owner's manual. Always confirm the correct oil type a