The blow-by gas from an engine, which can be toxic, is sent in to the mixture of fuel and air of a normal production engine. This can now be returned and sent to the combustion room along with the mixture with the use of the Cusco Oil Catch Can kit.

In comparison to competition cars, the blow-by gas is let out into the atmosphere. This oil catch tank will not pollute the air or re-burn the unneeded toxic oil, but instead, catches it and recycles it into the tank.