STIHL Woodcutter bar and chain oil is designed for high-speed, heavy-duty cutting-all at a value price. Ideal for professionals looking to keep their chainsaws operating at peak efficiency, STIHL Woodcutter oil is formulated from base oils and features additives to help extend the life of chainsaw bars, saw chains and oil pumps. Its specialized formulation includes highly refined oils for maximum lubrication, as well as concentrated tackiness additives to help the oil adhere to the saw chain at high-cutting speeds. When it comes to protecting your chainsaw, don't settle for anything less than STIHL. Unopened container shelf life: Four years in originally sealed containers. Container already opened shelf life: up to four years if stored in a firmly closed container, in a dark and dry location, at cool (up to 25 deg C/77 deg F) constant temperatures.