Ethanol Shield with CCT (Combustion Cool Technology) by B3C Fuel Solutions (24 oz.) Bottle. Ethanol Shield protects your entire fuel system from the harmful effects of ethanol blended fuel as well as clean varnish and carbon deposits from the fuel tank to the tailpipe! Ethanol Shield treats the problem not the symptom. Each Bottle treats 120 Gallons of Fuel. 6 Bottles per case.