Husqvarna ETHANOL FREE, high octane premium fuel with stabilizers. OCTANE RATING: (R+M)/2 METHOD 95. This product was specifically formulated to provide the Husqvarna equipment owner optimal 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. Avoids costly rebuilds and downtime. For use in all Air-Cooled 4-Stroke engines.