Additive	Purpose
Detergent/deposit-control additives*	Eliminates or removes fuel system deposits
Anti-icers	Prevent fuel-line freeze up.
Fluidizer oils	Used with deposit-control additives to control intake-valve deposits.
Corrosion inhibitors	To minimize fuel-system corrosion.
Anti-oxidants	To minimize gum formation of stored gasoline.
Metal deactivators	To minimize the effects of metal-based components that may occur in gasoline.
Lead-replacement additives	To minimize exhaust valve-seat recession.

Charts and tables for this article are taken from Changes in Gasoline II Technician's Manual, Downstream Alternatives Inc., 1995.