Anyone running Propane, or thinking about it?

Growing up in Soo Canada there were propane vehicle filling stations in 5 or 6 places around town. I was changing oil as a high school job back then and you could tell when a propane powered vehicle came in as the oil was absolutely new in color when you drained it. Diesels were blacker than black, gas engines were brownish to black but the propane vehicles were pure gold in color. If they had propane filling stations around here I would consider the conversion for sure just because it seemed to run so clean.