Biodiesel Fuel Blends, tell me if you run it and what is the blend (B2=2% bio & 98% petrol, B5=5% bio & 95% petrol, B20=20% bio & 80% petrol, and B100=100% bio). I am seeing some problems in a Kubota that is running it and I started wondering if any of you run and and what types of problems if any you have had from it. I have been reading up on this and have found out a few things. First thing, it gels quicker in cold weather than petrol base diesel fuel does. I draws moisture. You go though 2 to 3 times as many fuel filters and it eats up rubber componets (fuel hoses) so you need switch to Viton. You have to change the engine oil more often. Concentrations higher than 5% increase the likelihood of corrosion and failure of the aluminum, zinc, rubber, and plastic parts of the fuel system. I got this info from Kubota web site and from http://www.biodiesel.org if any one is wondering. Tell me your Biodiesel story.