About fuel dilution-there's damage all over that engine. Bearings, cam lobes, piston skirts *and none of it has blued from heat*, meaning it may very well have lost it's lubrication property. I didn't notice it at first, but even the rods and caps show no sign of excess heat from what I can see in the pics. The piston skirts show scaring. If the rings were washed out I can see that causing similar damage. They stated it wouldn't run over 3k rpm-if the rings were washed out they won't seal properly, you get a lot of compression loss on top of the over fueling. If it is fuel related, I don't have a clue that it's a sole fault of the injectors, the tune, or a bit of both. Once again, the log files from the pulls might show some things of value, especially fuel trim, O2, misfire values. There seems to be two trains of thought going on, I look at things from a Tech perspective wanting to know what happened to the engine,and for better or worse, many of the posts seem to revolve around integrity issues of the two men. Shame things turned out like this.