My supplier is selling BIOdiesel @ 11%.SOY is bio but BIO is not necessarily SOY.Only matters if you care who you're propping up.It smells funny but then I got a sensative nose.Can't tell a differance in performance.At least Govoner "grease ball" ROD don't get sales tax off it.
Ive been using a 5% for a couple years and with no complaints but a few things I have noticed... Detroits love it my 6v71 gets much better economy and I think more power but nonturbo tractors maybe dont have quite the power or economy. old rubber fuel lines will show leaks quickly. My powerstroke gets about 1 mpg better. And I dont know if I can thell the difference in my Deutz Gleaner. There you are.