Provide your marine outboard 4 stroke engine with the best in protection and performance with Penrite Marine outboard 4 Stroke 10W-40 engine oil. This semi synthetic engine oil contains modern technology rust inhibitors to provide excellent protection from harsh marine and salt water environments. Penrites full zinc anti-wear additives package protects your engine from harmful wear on engine internals while the multi-grade design offers excellent cold start performance and high temperature protection. Penrite Marine Outboard Four Stroke 10W-40 is suitable for use in outboard, inboard and stern drive petrol engines including PWC where SAE 10W-40, 15W-40, NMMA FCW, API SL and JASO MA oils are recommended. To find the correct 4 stroke oil type and weight suggested for your vessel; either check with your manufacturer, your local mechanic or head in-store and talk to one of our friendly team.