Just starting to learn about the G70's direct gas injection engine (which I believe is the same engine used in the KIA Stinger). Wondering whether Genesis includes an air/water separator in the PCV plumbing (probably not) and whether installing an aftermarket catch can would void the warranty (probably yes). Perhaps valve fouling will not be problem for owners because of the 10 year/100,000 mile powertrain warranty. Any thoughts? Has anyone installed a catch can?