SIERRA PREMIUM 25W-40 OIL

  5W-40 4 stroke marine stern drive engine oil has been formulated to provide excellent lubrication and corrosion protection. Stern drive and inboard engines operate under high load and running stresses. This product is developed for the marine environment and will out perform standard 4-cycle automotive engine oils. It offers excellent detergency, anti-oxidants, antiwear, and corrosion protection.  Reduces wear to the internal components, protects internal parts from corrosion, cleans pistons, and prevents ring sticking. Excellent low temperature operating properties