Starbrite Star-Tron Fuel TreatmentKeep your marine engine running at peak performance with StarTron Fuel Treatment. This multi-functional additive prevents ethanol-related issues, removes gum and varnish deposits, and breaks down water and sludge into particles small enough to burn away safely. Compatible with all gas outboards and inboards, StarTron helps engines start easily and run smoothly - even after sitting idle for months. Simply add the prescribed amount before each fill-up for better fuel economy, reduced emissions, and reliable operation on the water.Features: 1oz of Star-Tron to 16gal of fuel; For use in all gas engines; Cures and prevents most ethanol problems; Makes all engines start easily, run smoothly; improves performance; Removes and prevents gum, carbon and varnish; Works in all engines and in all fuel; Improves performance and fuel economy; Stabilizes fuel; helps rejuvenate old fuel; Reduces smoke and all other emissions; Keeps fuel delivery system clean; Available in the Following Sizes: 8 oz. Treats 128 Gallons; 16 oz. Treats 256 Gallons; 32 oz. Treats 512 Gallons; How to Use Starbrite Star Tron Fuel Treatment:Use StarTron with all gas outboards, inboards, cars, trucks, motorcycles, ATVS, snowmobiles, small engines, outdoor power equipment including pre-mix fuel engines. Initial Dosage: Add 1 fl. oz. (30 ml) for every 8 gallons (30 L) of gas. ; Refill: Add 1 fl. oz. (30 ml) for every 16 gallons (60 L) of gas. ; Always add Star Tron just before each fuel fill-up. Remove cap and pout the prescribed amount into tank. Overdosing is not harmful.