If you are using a fresh container of gasoline, you generally need 50 parts of that fuel to one part of oil. Stihl recommends using gasoline with an octane rating of at least 89 (91 RON) and an ethanol content not exceeding 10% (E10).
Stihl Oil Gas Ratio Model Specs for Every Engine Type
For smaller volumes, 50:1 equates to roughly 5. Understanding the 50:1 Mixture Standard For the vast majority of modern Stihl power tools, the required stihl oil gas ratio is 50:1.
Some newer Stihl tools, particularly those equipped with advanced injection systems or specific high-performance engines, may require a 40:1 ratio. When mixing, always pour the oil into the container first, followed by the gasoline.
Stihl Oil Gas Ratio Model Specs for Different Engine Types
Calculating the Measurements To achieve the correct 50:1 mixture, you need to measure accurately. Too little oil causes increased friction between moving parts, leading to rapid cylinder wear and potentially requiring a full engine rebuild.
More About Stihl oil gas ratio
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