I have been running b10 (10% blend) and hve had no problems whatsoever. I think I see less smoke, do not notice any loss of power. I hear when you first run it the biodiesel has a tendenacy to clean the system and may actually plug the filters until clear. This is not the biodiesel, just the junk in the fuel. Once clear- it apparently is OK. I did not experiece this. It does need to be properly blended. Once blended, no problem. Here is the National Biodiesel Board website: http:__nbb.org_ WHY AREN"T All FARMERS DEMANDING THEIR SUPPlIERS DElIVER at least a 5% blendIJ It is available all over Ohio, I assume, most other states. Call you soybean association or checkoff offices for a list.