Star Tron Enzyme Fuel Treatment Features: Super-concentrated formula treats 256 gallons of fuel Cures and prevents ethanol fuel problems including engines that are hard to start or run rough Enhances the combustibility of fuel and helps prevent phase separation by dispersing water throughout fuel so that it can be vaporized during the combustion phase 1 oz of the concentrated formula treats 16 gallons Ideal for cars, trucks and treating large quantities of fuel Unique enzyme formula cures & prevents ethanol fuel problems Eliminates and prevents gum and varnish deposits Makes all engines start easily and run smoothly Works in all 2 & 4-cycle engines from 1 to 16 cylinders Rejuvenates old fuel Stabilizes fuel for 2 years Improves fuel economy