I've been using this stuff in my cars since my first car. I heard about it from a friend of mine, he refered this stuff to me and i always use it for every car that i buy. Anyways if you get a can and use a vaccum line that leads to your intake plenum. Suck it all in there or maybe half of it, you can use the remainder in your gas tank or your crankcase. It will clean your fuel filters, injectors and fuel lines, or in the crankcase free up lifters, cams, just clean up all of that carbon buildup inside the engine. As the car sucks up the liquid and you put a desired amount in you shut off the car. Let it sit in there for a couple of minutes, then start up the car. Now your car might hesitate and try to stall so you are goin to have to rev it up a little bit. Don't freak out because you'll notice that your car is smoking alot, depending on how dirty your car is will affect how much smoke gets out. My old maxima smoked just poured out, you can just drive it off. The smoke will end in about five minutes or so. Afterwards, you'll notice better response in your car. It always has worked for me and my cars always run better in result of using seafoam. I was just wondering if anyone else has heard about Seafoam and have they used it?