Quicksilver Power Tune© is recommended to assist in restoring lost power due to carbon, gum and varnish deposits that accumulate in the combustion chambers of gasoline engines. These deposits are the result of normal engine use, low temperature operation and the use of some fuels. Removing these deposits helps improve fuel/air flow and overall engine performance. Use in all 2‑ and 4‑cycle carbureted and fuel‑injected gasoline engines including cars, trucks, motorcycles, ATVs, snowmobiles, marine engines, lawn mowers, chain saws, string trimmers and snow blowers. Safe for catalyzed engines. 340 g (12 oz) spray can