Well so far after replacing the CPS, the truck has been running fine. It would start up just fine, on cold days Id have to use the glow plugs, normal, but otherwise, the oil blends proved to not cause problems. So far Ive gone 7 days on just the oil blend, going to and from the city to the job or to do other things on the weekend, 30+ miles one way, all highway driving. Im theorizing that the high RPM running is probably doing the engine good on the oil blend since the fuel is moving through pretty fast and nothing is allowed to build up through the periods that the engine is idling. Ive been doing both of the blends, the 50/50 WVO/diesel and the 80/20 WVO/gasoline, with no ill effects. Starts and runs the same no matter what. Even when the temps drop down into the low 40s the engine still ran just fine, even at 70mph. So, it appears that the gremlin called coincidence did rear its ugly head during my WVO exploits. More to come as time progresses....