hello guys my cousin right now has an 06 powerstroke and he said the most percent biodiesel he can run is 20%..now me n my dad have the 7.3 and we have bene running 100% and havent had a bit of trouble what is the most you can run in this 6.0?? i dont see why 100% wouldnt work??

 

Ford says no more than 5%. Read this forum: https://www.ford-trucks.com/forums/forum168/ there are a lot of very knowledgeable guys that will answer any questions you have.