Shell Oil - NAUTILUS PREMIUM TC-W3 OUTBOARD 2-CYCLE OIL - Gallon - 550045939. Shell Nautilus Premium TC-W3 outboard oil is a high performance lubricant for the superior protection of all 2-stroke gasoline outboard motors. It's advanced formulation exceeds all outboard motor manufacturers' standards and is designed to deliver long, reliable engine life.. Size - Gallon. Weight - TC-W3