I don't know where you are in Oregon, but on this side of the border, there isn't a 10% ethanol requirement, yet. At some point all diesel in Oregon will have to be at least 2% biodiesel. I don't care for the ethanol in gasoline, but I think the biodiesel in the diesel is good because of lubricity.
However, there won't be any frozen gas line problems in Oregon this year since the ethanol will take out all of the water.
On the bad side of the biodiesel addition, biodiesel tends to loosen and clean out the sludges and other gunk in your tank and lines. This can cause filters to clog. However, once its clean it will stay clean.
I grow hay and I am making money off all this biofuels nonsense. The higher grain prices have led to decreased land in hay production, so hay prices have gone up dramatically.
Everything has its pluses and minuses.