well, start reading this forum!
i don't have much time to write today, but there are a few main points to consider
1) filter it
2) NEVER allow WMO/WTF to mix with your WVO or bio.
3) don't get greedy. some guys run like 90%, and suffer short fuel system life as a result. personally, my use has evolved from 10% to 25%, and thats about as far as i think i'm going to take it.

i'll try to give a few more thoughts later, gotta run