Keeps fuel fresh Top end lubricant Corrosion protection Treats and stabilizes ethanol fuel up to 24 months Contains a measuring chamber for any measurement under 1.4 oz Made exclusively in the USA the Opti-Mizer MAX 61612M 16-ounce Ethanol Fuel Treatment Stabilizer with measuring chamber is specially made for keeping fuel fresh, protects against corrosion, and treats and stabilizes ethanol fuel up to 24 months. The measuring chamber that measures any amount under 1.4 oz. The Opti-mizer is a top end lubricant.