Yup, there are the idiots that like to "roll coal" as they call it. I been telling them for years all they are going to accomplish is getting tickets and making stronger pollution laws. I have never been a fan of smoking diesels, none of mine do and I seem to out run/pull the others. My jetta is a consistent 50 mpg getter, the sling is around a consistent 27 mpg getter. So I think a jetta diesel in a sling could give somewhere around 60 to 65 mpg, and be a snappy front wheel drive ride.