You can also use it to de-carbon your motor. You mix a bottle of it with a gallon of gas, run that through the motor for 15 minutes, let it sit 15 minutes, run it again for 15 minutes...until the gallon is gone. A warning though, your motor will smoke like crazy though. You can also spray Sea Foam Deep Creep into the air intake while doing the above procedure if you want to clean up your intake as well. If you do both at the same time it will smoke to the point where it will look like something major is on fire to the neighbors.