The Best Fuel Stabilizers (Including for Cars, Power Tools, and Generators)
How-To: Stabilize Your Generator's Fuel For Storage - AdditiveHelp.com
STA-BIL Storage Fuel Stabilizer - Guaranteed To Keep Fuel Fresh Fuel Up To Two Years - Effective In All Gasoline Including All Ethanol Blended Fuels - For Quick, Easy Starts, 128 fl.