How do you test the in-the-valve-cover CCV? Newly purchased 328i is burning 1 quart every 400 miles. There are differing opinions on the web and I would like clarification before purchasing another valve cover.
-Long Life 01 Full SAP oil in use
-New Valve Cover gasket...no oil leaks above and minimal drips below
-Idles and runs well with no blue smoke
-No OBD codes
-No known vacuum leaks...fuel trims are 0-3%