Colin,

I put my 20/80 mix in the freezer four hours ago and this is what I found. Hard to see in the pics but we definitely have separation. The curious thing is that it looks more like a 40 oil by 60 kero mix at this point. This bottle was mixed last year and only tried this last little while. It never got below 50F in the basement and I had no separation. Well below freezing, however and we have a problem,,, or so it seems. Will be taking this frozen mix to the field right now and try to run it before it warms up too much. Yes, I'll give the jug a good shake.