LED Lead Substitute additive for all gasolines. With LED Lead Substitute you can run unleaded gasoline in older engines with soft valve seats originally designed to run on leaded gasoline or use it in high performance, high compression engines to help prevent valve seat wear. Safe to run in that street rod with catalytic converters or in that hard charging high RPM marine engine.  Have a screaming high performance small engine in a dirt bike or go-cart?  2 stroke or 4 stroke, LED Lead Substitute will help that little monster stay together. This advanced formulation also keeps fuel injectors and carburetors clean as well as reducing intake valve and port deposits. LED Lead Substitute is available in 8 oz consumer sized bottles that are just right to treat 20 gallons. LED Lead Substitute is also available in a more concentrated 16 oz version that treats 150 gallons of gasoline or when ordering a bulk gasoline delivery for your farm or shop from Doolittle Oil Co, just ask for LED Lead Substitute to be added to your gasoline. Costs a little more but does a lot towards keeping your gasoline powered equipment running smooth and strong.