John, what does the cetane of bio usially come out to. How about the svo cetane. Ive hread on enternet that good bio is a bit higher than pumpdino. I would guess svo would be a bit lower than the pumpdino. What have you seen with the actual cetane reading?? What is it your testing with and were can I get some cheep <img src="/forums/images/graemlins/smile.gif" alt="" /> For bio did u use litmus paper to check ph before final rinse? My friend used wallmart litmus his swimpool, wonder if would work with bio. I really would like to start producing bio. I sold a 1000 gallons plus of my suppliers fuel 2 days ago. At 1.65 a gallon Im sure HE maid a healthy profit. Lyle