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Minnesota (a north-central USA state) has required all diesel fuel to contain 2% bio (soybean oil, as that is what we grow here, tho dead-animal places are also adding a small amount) since last September. The plan is to ramp up that amount as in-state crushing plants come on-line, to 5% is the plan for now and likely up to 20% some day. We get very cold, so any problems will turn up 'here'. :) A few did last winter, but seems to have worked it out. That is the commercial, big side of things. For the average farmer, one can get a barrel of soy-oil from any of our fuel suppliers & have it splash-blended to whatever % you want. Most go around 20%. Many individual farmers are doing this for their tractors, combines, & trucks. A lot of, um, hippie-type folks are brewing their own fuel from old frier grease, & other such sources. I'd call that kind of a hobby deal tho, seems like it doesn't have a bright future, relying upon collecting free cooking oil from resturants.... (Minnesota also has required 10% ethanol in it's gasoline for decades, & just passed laws that would ramp that up to 20% in the future. E85 which is 15% gasoline, 85% ethanol is available about every 25 miles or so at many gas stations.) --->Paul
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