My understanding is that this is a compliance check; (i.e. what is written on the label is in the bottle) not a contest to show what is better; edit i now understand.
Thanks for including Blain's oil in your test. I see it used frequently in ag and construction equipment locally. Any plans to test Blain's 5w-40 synthetic blend diesel oil?
Traveller seems lacking in Ca as far as diesel oils are concerned although I have the same opinion about Delvac too. Just surprises me since Tractor Supply sells a ton of it.
As far as conventionals are concerned, I'd go Rotella all the way followed by Delo.
I think the days of high Ca HDEOs, particularly from the majors with ACEA E7, E9 or E6, E7, E9 specifications, are over. Most of the big names with those approvals (and a bunch of builder approvals) have gone to the Mg package.