Husqvarna ETHANOL FREE, High Octane Fuel is mixed with Husqvarna's best synthetic oil blend. OCTANE RATING: (R+M)/2 METHOD 95. This product was specifically formulated to provide the Husqvarna handheld owner with optimal equipment performance. Fuel does not degrade or oxidize like pump gas. Fuel stays fresh for years solving longer term storage needs. Easier, more dependable starts. Protects fuel systems & saves carburetors. Avoids costly rebuilds and downtime. Convenient, ready to use, no mixing required. JASO-FD certified premium synthetic oil blend for your 2-Stroke air cooled engine.