http://www.flyingmag.com/aircraft/pistons/premier-launches-diesel-cessna-172-upgrade-program?cmpid=enews022114&spPodID=030&spMailingID=20039735&spUserID=Njk5NTU0NjI1NDkS1&spJobID=261266857&spReportId=MjYxMjY2ODU3S0 (http://www.flyingmag.com/aircraft/pistons/premier-launches-diesel-cessna-172-upgrade-program?cmpid=enews022114&spPodID=030&spMailingID=20039735&spUserID=Njk5NTU0NjI1NDkS1&spJobID=261266857&spReportId=MjYxMjY2ODU3S0)
with that UPGRADE PROGRAM the AVGAS users become smaller and smaller and the price will speed up.