The cars that typically have PCV problems are those without the intake valley pan gasket. Never had an oil sucking problem until I went to the felpro 1200’s were installed and believe me, it was bad! I put in a catch can followed by a clear gas filter . . . . that were both much lower than the TB . . . . and it would soak the filter element in 10-15 min! Since the car is no longer a DD, I unplugged the SomNaBitch.