Been running B100 douring the sumer months and B50/50 over the winter. Only problems I've run in to were fuel gelling, Ok I did get one batch that was not clean cloged up the filters, don't use that guy any more. I like the idea that the fuel is made from waste product and that it keeps our farmers working. Anything that we can do to keep our money here in the USA and not send it over seas is a good thing.