Question about Einhell 4600040 GE-PS 18/15 Li BL-Solo Power X-Change 18V Li-Ion cordless chainsaw

Yes, the chainsaw must be topped up with oil to keep the chain sufficiently lubricated. The oil provides a lubricating film that protects the chain from overheating and damage. It is important to use the correct oil with a suitable viscosity, as the oil can liquefy at higher temperatures and otherwise the lubricating film will break off, resulting in damage to the chain. An oil dosing aid is included in the scope of delivery to make topping up easier.