Application –This powerful formulation of concentrated solvents is specially formulated to remove dirt; carbon, gum and varnish deposits that tend to build up on the moving & sealing surfaces of engine carburetors, heat values & automatic chokes, throttle bodies, PCV valves & linkages. It helps to free sticky valves, struck heat risers and throttle linkages. Periodic use on cars, trucks and other vehicles will keep engines clean, fuel efficient and trouble free.