Yep, that's how you ensure you'll get the best results - hit up all the different points mentioned above by chaos, and you'll fully clean the engine of oil residue. If you're still not sure of that, do a search here for "seafoam" and you'll find all sorts of threads where people mention putting seafoam into the oil, the manifold, and the gas tank.

 

talk about burning oil, i got a min oil light the other night and i added a whole quart grrr. i rly gotta get ma pcv valve replace along with the vcgs lol.

 

Allright, can I get a straigt anwser here. What the heck is a vcgs.

 

valve cover gasket if i had to guess