You put it in through the brake booster and then shut the engine off and let it sit for 15 minutes. It's like gas. It clings to and disintigrates some of the carbon, to clean the engine. So when you restart it, your burning the SeaFoam AND the crap off, and they is the smoke. :) I do not think they sell it in Aus, but I'm fairly sure there is a similiar product.