Ok Doug. This is what I would do. Now, I’m no expert , but, my experience is most kohlers have a funny noise in them. I have come to accept that that’s the way it is. You’d think they were going to have trouble but they don’t, it seems.
So, don’t get to excited yet, this is what I would, and that’s just me. I might get kicked off the site here for saying this , I would refill with oil and try it again. What ever put the stuff in the oil could just be normal for break in or something is wrong. If some thing is wrong, it’s already no good. Doing a second test is not going to change that much. But after the second run and then check the oil and if it’s the same or it’s better. If it’s better, that’s good. If not, well I might try it one more time. If then it’s no better. It’s come a part time. That’s what I would do Doug. Again that’s just me. Shoot me if you want, hehe. Just my opinion. We all have one. Good luck with it Doug.
Noel