[Jake Raby]

Based on the size and shape of those particles collected on the drain plug, I'd expect that you have a failing camshaft/ lifter in process.

I would pull the sump plate and look for more. I would also pull the swirl pots and pull them apart. Since return oil from the cylinder heads/ valve train area passes through them, they collect a good bit of debris before it gets to the sump. The side with the most debris is the side where your issue lies.

Most importantly, cease operation of the engine until you find the source of the issue. With all this debris being generated as the engine runs, it's destroying its self from the inside out. It will run perfect until it pops, then you have thousands of dollars worth of collateral damage to contend with.

Please don't drive it to death.