The STIHL High Performance 2-Cycle Engine Oil 0781 319 8049 is a premium, mineral-based oil developed specifically for use in all STIHL 2-cycle engines, with an emphasis on professional chainsaws. It is designed to provide optimal lubrication and engine protection, helping to keep your equipment running smoothly and efficiently. The 5.2-ounce bottle is a pre-measured size intended to be mixed with 2 gallons of gasoline, ensuring a perfect 50:1 fuel/oil mixture.