While I am not going to taddel or anything but your warranty is only good to B5, Cummins oks B20 for industrial engines with extra filtration. If you are going to run biodiesel you really don't need to do anything but I would watch the fuel filter.what mods do I need to do to my truck if I want to run like b40 in my truck?
2008 3/4 stock 6.7 6sp auto
:welcome: Since you have some miles on your truck start with B5 or B20 and work your way up to B100. This will stagger the amount of crap heading to your fuel filter. Adding another fuel filter down stream would also not be a bad idea in you plan on running biodiesel a lot. As far as making your own, I have not but I am working on getting the necessary equipment to do it soon.hey guys, im new to the site, im pretty interested in running my cummins on biodiesel. A few questions, i read in some articles that biodiesel is bad for engines with high mileage because it does a great job at cleaning all the build up that has occured over the years? so my 01 has 212k miles, do you think running biodiesel would be ok? also, have any of you guys tried making your own biodiesel? if so , any tips? thanks