diesel fuel question

The 2013 and above CTD are designed to use B 20 The years I believe 2007 thru 2012 pollution equipment EGR etc are designed to run on no more then B5. I sent an email to Ram and they replied with a well written response. In short it stated that anything above B5 will damage my fuel delivery system ie: injectors etc. and they will not honor the warranty. The older diesels can use the higher bio diesel. The politicians that mandate the bio diesel limit rules don't care about your issues only the contributions from the bio and ethanol industry. One of the benefits of having a 60 gal RDS aux. tank is that it gives me 95 gallons of fuel and I can fill up with non bio and travel thru the states that only allow it.