Since the early 90's we've used reformulated gas in Louisville Kentucky. It has made a big difference in our air quality. I would hate to go back to the days of smog so thick you couldn't see our downtown approaching it from the expressways. Please someone get control of the EPA Pruitt is making things easier for industries to put us back 50 years and make everyone involved with fossil fuel wealthier than they already are. Another swamp dweller cabinet member.