25W-40 4-Stroke Marine Engine Oil

Sierra 4-stroke 25W-40 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 outperform standard 4-cycle automotive engine oils. Sierra Quality Marine Lubricants exceed stringent Sierra and OEM warranty requirements. DO NOT MIX WITH GAS. NOT for use in 2-cycle pre-mix or injection engines.