What weight oil is the chainsaw chain oil?

Chainsaw chain oil is typically a specific blend designed for lubrication, often referred to as bar and chain oil. It usually has a viscosity similar to a 30-weight oil, but it's formulated to adhere to the chain and bar while providing necessary lubrication. Some manufacturers may recommend using their branded oil for optimal performance, especially in varying temperatures and conditions. Always consult your chainsaw's manual for the best oil recommendations.