With the advent of SM category motor oil, less naphthenic content, if any, is in use for automotive engine lubes. Ironically, as demand ramps up for Group II and, especially, Group III paraffin base oils, the resulting plant conversions to supply these has resulted in a shortfall in naphthenic supplies in North America. They're still in high demand as electrical insulating oils in large transformers and capacitors, industrial uses such as cutting oils, and production of certain print inks to name a few uses. Additionally, naphthenics can be used as feed stock to produce Group II and Group III paraffin base oils through severe hydroprocessing.