20% Bio Fuel at Flying J/Pilot

I noticed the B20 last year, so far on my LBZ engine zero issues. I asked a GM Medium Duty Diesel Mechanic about it, he said so far he has not seen any failures attributed to B20, mostly folks that think they can get 40K plus out of a fuel filter. He said the while GM said for a long time not to use B20, the newer B20 is filtered and refined much better and I should not be concerned about it. I asked the Cat mechanic at Quinn Power, he said they have not seen any issues with B20 either, and technology on refinement has removed the contaminants which were a problem in the earlier B20 mixtures. He said to use it in my C7 and not worry about it, the engine will run fine.