Specially designed to improve performance in all petrol engines by thoroughly cleaning and removing gum, varnish and carbon deposits. Cleans intake ports, valves, pistons and combustion chambers. Frees sticky rings without removal. Designed for regular maintenance of both 2 and 4-stroke engines. Squirt entire contents of can into engine intake with the engine running at 1000-1300rpm. Shut down engine and allow to stand as per instructions on can, then restart to clear out the build up. The engine will respond immediately to the improvement.