Interesting article ..but I do not see where the PCV ensures engine protection over a properly vented crankcase. It helps with emmisions which is usually not an issue with our cars.
A clogged or dirty PCV, according to the article, can "cause" engine damage. ..oh..oh. I never noticed
oil residue on my covers that could not be wiped clean with my regular maintenance. A vented crankcase is a must, whether it is vented with breathers on the covers, tubed down below or with a PCV. I prefer open breathers and nothing but a COOL/CLEAN air charge flowing down the carb.