STIHL® MotoMix® High Performance 50:1 Fuel Mix is a patented premixed fuel that's specially blended for ultimate performance. This 50:1 mixture is a combination of premium 92 octane gasoline and our highest-quality STIHL HP Ultra Oil. Clean and convenient, MotoMix eliminates the hassle of mixing your own 2-stroke engine fuel while providing superior performance and lubrication. 1-gal. can. 
Features + Benefits

50:1 fuel mixture combines premium 92 octane gasoline and premium STIHL HP Ultra Oil
Contains no ethanol, allowing it to maintain stability for up to 2 years after the seal is broken so it stays fresh in your equipment during long storage periods
Made of non-aromatic fuel and fully synthetic, highly biodegradable engine oil