Just filled up my truck yesterday with B20 Biodiesel like always, but this time after a few miles, the truck runs like crap. stalls out going down the highway, and I cannot push the throttle very hard or it stalls. Any ideas? Bad fuel? I was thinking clogged fule filter, but I just changed it not to long ago. Are my injectors going bad already? Only have 60,000 miles on the truck with a nictane filter.