4 OZ, Ethanol Shield, For 2 Cycle Engine Use, Protects Your Entire Fuel System From The Harmful Effects Of Ethanol Blended Fuel & Cleans Varnish & Carbon Deposits From The Fuel Tank To The Tailpipe, Treats The Problem Not The Symptom, Preventative Maintenance Formula, Removes Water, Prevents Ethanol Phase Separation, Contains Rubber & Plastic Conditioners, Increases Octane, Fuel Stabilization, Upper Cylinder Lubrication, Reduces Emissions, Synthetic Fuel Additive, Safe For 2 Cycle Engine.