Description Reviews Sea Foam Motor Treatment! The generation 2 Cooper S's have been seeing a buildup of carbon on the intake valves since they are a direct injection engine. We have had people do it every 5K and has shown no buildup at all. We recommend it at least every 10K to keep things working correctly. This can treat multiple things on the MINI. Sea Foam Motor Treatment for Gas and Diesel Engines is a 100% pure petroleum product that works instantly to clean deposits from internal engine parts and remove moisture from oil crankcases and fuel tanks. As a fuel system additive, Sea Foam motor treatment will clean carburetors, fuel injectors, clean carbon, gum and varnish deposits, add lubricity to fuel, stabilize fuel and control moisture. As an oil system additive, Sea Foam controls moisture, gum, varnish and residue deposits. This kit is specially designed for the N14 motors that can use thru the vacuum port on the valve cover, unlike the N18 motors. The N18 motors should use the spray-in Sea Foam. For the N14 motors, with the car running, remove the vacuum line to the rear of the passenger side of the valve cover. Pour half of the bottle into the vacuum line slowly. Once done, reattach the vacuum line and turn the car off. Let it soak for about 5 minutes while you remove the adapter and make sure your boost clamp is tight and back to factory look. Restart the car and run it at an increased idle until all the white smoke has cleared. We recommend doing this outside. By doing this with every oil service, you will not need a carbon blast down the road, and you car will not lose performance over time because of buildup! Sold per bottle. Note: You will need a 1/2 bottle just for a valve cleaning; so if you plan to treat fuel and oil also, get 2 bottles.