10% Off Your Order! Use Promo Code: MAYDAY10

Sierra 25W-40 Oil For Mercury Marine Engine, Sierra Part #18-9440-4P

Item # 749836
Please make sure all selections are complete and a valid quantity is entered and try again.

Ships within 7 - 10 days

Additional Information:
  • This item must ship ground only.


  • Sierra Part #18-9440-4P

  • 25W-40 oil

  • For Mercury Marine engine

Product Summary 

Sierra 25W-40 oil for Mercruiser engine. This 4-cycle oil is blended with premium-grade synthetic and mineral-based stock, plus superior designed additives formulated for the stress endured by sterndrive and inboard engines. Superior corrosion protection. Advanced lubrication reduces wear. Removes thermal breakdown under high RPMs and extreme temperatures and loads. Includes 144 5-quart containers of oil. Sierra Part #18-9440-4P.

OEM Part Number: