Ok I have located a good source of VO in my area. The trouble that I have is I live in mn where the weather is cold in the winter. If I store the VO from the restrant in a tank in the winter months then make and use the bio in the warm months "using all that I have made b-4 winter" then store the VO over winter and start the process all over. Will that work or does the VO have a shelf life. Thanks...