All STIHL saw chains are equipped with a patented OILOMATIC lubrication system, designed to optimize performance and durability. This system includes precision-engineered grooves on both sides of the drive links, which direct bar oil to the chain's most critical wear points. By ensuring consistent lubrication throughout operation, it helps extend the life of the chain and minimizes the risk of stretching. The PM chain delivers all these benefits along with reduced vibration levels, allowing for longer, more comfortable work sessions with less fatigue.