STIHL 2-cycle oils are formulated to meet the high temperatures and lean running conditions of today’s innovative and technically advanced STIHL engines. All STIHL 2-cycle oils contain a fuel stabilizer for longer storage life and to prevent fuel varnishing. STIHL recommends a mix of 50:1 high-quality 89 octane unleaded gasoline to STIHL engine oil. This same mix ratio should be used during break-in. Oil is packaged in 100 ml, 200 ml, 500 ml and 1 litre bottles (100 & 200 ml also available as a six-pack).