SEF Multi-Mix provides ethanol-free, 90-octane performance with the highest quality broad-spectrum synthetic 2-cycle lubricant on the market, making this the perfect blend for both 40:1 and 50:1 applications. SEF's proprietary lubricant exceeds industry standards for lubrication both JASO FD and ISO-L-EGD. SEF also provides easier and more dependable starts. Pump gas can contain up to 15 percent ethanol, which will absorb moisture and form deposits in carburetors and fuel systems, making equipment hard to start and often requiring complete rebuilds. SEF solves long-term storage problems, allowing easier starts even after equipment sits idle for months at a time. It saves money in the long run by avoiding the lost time and expense of costly rebuilds. It's good for storage of up to two years in a vented tank and five years in its factory-sealed container.