How do I use Sea Foam in my 1995 Frod Probe?

The engine compression is high, which is a sign of carbon build up, especially since I have a faulty EGR valve. How do I use SeaFoam to decarbon it? When do I need to change the oil after doing it? If I don't run the SeaFoam trough the crank, then do I still need to change the oil?How do I use Sea Foam in my 1995 Frod Probe?
If you don't run it through the crank or if you do run it through, you don't have to change the oil in either case. It doesn't hurt to leave it in with the oil, it's made to clean the insde of the engine .Make sure that you use the right can of sea foam, they also make one just for the transmission , the other one can be used in the fuel or engine oil.