Sierra® 25W-40 4-Stroke Marine Stern Drive Engine Oil.
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. Sierra's 25W-40 oil offers excellent detergency, anti-oxidants, anti-wear, and corrosion protection.More:
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