How do I make sure they do it right?
I have used some fluid in oil changes before that sort of washes the inside of the engine. You warm up the engine, pour it in and run it for about 5 minutes, then drain the oil.

Like I said, I have used this before on other vehicles, but I didnt care about those vehicle like I care about my VX.

The main reason I want to do something like this is because when we started discussing about the PCV valve, I jumped from my seat and went to Auto Zone. When I removed the old one, it still had some play in it, but it was surrounded by gunk, even that little grommet that holds it in place was covered by it and I removed it by hand.

So that got me thinking, if the gunk is way up there, I can imagine what the inside must look like... Well I don't really want to know, I just wanted GONE.

What do you guys think?