@KenR 955
I forgot, redline has having some bullsnot issue with tin we have not got an answer on, I believe it was in containers used to deliver raw materials but we get who shot john from redline on this issue. I remembered when I relooked at the uoa and saw the tin reading. So I'm not convinced the aluminum is an issue but maybe that is related to tin, I dunno. But since they both are at 5, I would continue to do uoa's and watch the correlation from al and tin.
Maybe shoot an email to blackstone and give them the info on tin and see if it can be related to the ALUM reading.
Might I ask what was the reason for moving to redline 4-5 oci's ago/? It appears you have one of those great hemis. If there was no reason for it, you may opt to try some shelf 0w30, those are great effort oils by manu's most are high quality, and see where aluminum is. wear is the same 20 weight shelf oil to redline thirty weight, so you should be good either way. PSI issue aside. On the other hand that iron has dropped from already low numbers, pretty impressive. Nothing in any one of your uoa's are close to concerning at this point, so staying put is another option. Maybe take a sample and send it in before you change the oil next time, help with the decision.
You should post that in blackstone thread, great example of whats going on currently.
.