Its outstanding lubricating properties make this Stihl 1:50 oil one of the most used engine oils in Europe. Carbon build up in the combustion chambers is also reduced. This engine oil is mixed with either leaded or unleaded petrol in a ratio of only 1:50 Semi-synthetic "low-smoke oil" High quality low-ash additives developed for STIHL engines Outstanding start capability Clean, low smoke burning JASO-FD, ISO-L-EGD 1:50 fuel/oil ratio Size - 1 Litre metered measured bottle ST07813198054