Lucas Safeguard Ethanol Fuel Conditioner with Stabilizers was developed to specifically address issues associated with using ethanol based fuels. This applies to E-10, E-15, E-85, pure ethanol and any mixtures in between including gasoline. This fuel conditioner is completely soluble in all ethanol fuels and will not harm filters and contains effective additives to prevent rust and corrosion associated with the use of ethanol fuels. One ounce of Lucas Safeguard treats (5) gallons of ethanol fuel. The 2-ounce bottle treats up to 10 gallons (38 liters) and the 16-ounce bottle treats up to 80 gallons (302.8 liters) of ethanol fuel.