Designed for high-speed and heavy-duty cutting, STIHL Woodcutter Bar and Chain Oil is affordably priced and specially formulated from base oils and additives to provide superior lubrication and help extend the life of chainsaw bars, saw chains and oil pumps. It’s the ideal choice for budget-conscious professionals that want to keep their chainsaws in optimal cutting condition. Unopened container shelf life: 4 years in originally sealed containers. Container already opened shelf life: up to 4 years if stored in a firmly closed container, in a dark and dry location, at cool (up to 25°C/77°F) constant temperatures.