My question pretty much is I am running a Techco supercharger and only 5.5psi boost. I have a catch can as well. But as I read on here, it should fill up about half way or less every 3000 miles, of course this being on a stock application. Mine fills up full in almost 400 miles? Sometimes more if your romping on it. When you run a supercharger and a catch can, since it is running higher atmospheric pressure, does it make it fill up the catch can and is it normal? Supercharged guys any input here what are your catch can fill up intervals?