While I've heard the EGR issue before, have you checked your oil filler cap gasket?? If it's not sealing perfectly it will allow oil into the intake system. Also, we've gone on our two Vx's from a quart of oil usage per 1000 miles to almost zero usage by upgrading our PCV valve to the Purolator brand #1061 with a fresh filler gasket. Try it you'll like it.