SPUK77
Ford hasn't used rubber fuel components for some time so changing those parts is not necessary.

For your friends running ubheated VO, it works for a while but the rings injectors and valves eventually get coked, a build up of carbon, and the engine fails possibly catasrophicaly. I have a fairly long research paper on the dangers of running unheated VO. I tried to post it here a couple of times but it is to long.