That is a very interesting video. Let's assume it is TRUE, and CORRECT. (Most likely is)
The difference between gasolines is something I have been posting for the reasons we SEE here. Better gas burns cleaner.
The one I do NOT understand is Bio Eth. Eth. is distilled from almost anything, and is always the same regardless of the Source material. Perhaps the Bio eth is Bio diesel, and Eth?
The main focus is how clean it burns. That has not been debated on this thread. The focus is on the damaging or corrosive nature of Eth.
I FIRMLY believe Eth. is a MUCH better fuel source but parts of the world are not prepared to use it as a regular fuel base. I believe resin based fuel system components will replace the metal/rubber compounds we use today, and in that case Eth will reign supreme. Till then most of us are having to deal with force feeding, and costly repairs.
Thanks for posting the vid tho... It helps to "clear the air"