Prevent future engine problems with Ethanol Shield. This year-round triple antioxidant formula fuel stabilizer is used for your power equipment with 2-cycle and 4-cycle engines. This preventative maintenance formula eliminates then prevents ethanol-related problems. It removes water, provides easy engine starting all year, and keeps stored fuel fresh. Use 1 oz. per 10 gallons of fuel. 24 oz bottle - sold in a 2-pack.