Hmmmmmm ... someone is trying to reverse-engineer a lube, as if he/she knew more than all the tribologists and statistitians in a multi-billion dollar industry ... Regardless of the folly, I'll say this:
You are going about this backwards. You have told us nothing of the nature of all the vehicles you maintain or the conditions that surround them.
Are they all gassers?
Do you have any diesels?
Any alternative fuels?
Are they all liquid cooled? Some air-cooled?
What are your OCI plans?
What operating environment?
What applications? (vehicular travel, farm equipment, stationary equipment, lawn equipment?)
What grades are spec'd for all your applications?
Etc.?
You're looking for a one-size-fits-all lube that may or may not exist. You are essentially looking for a compromise of many characteristics. I find it interesting, and a bit foolish, to think that you've set forth on mixing up fluids, and are only asking for advice after the fact. You indicate that you are mixing fluids to "arrive at the right cSt" for your different engines. Please explain exactly what viscosity you have determined to be perfect and how you came about that conclusion.
What you "want" and what you "need" are likely worlds apart.
What makes you think that high-quality dino PCMOs don't have the correct amount of dispersants for your applications? What makes you think that only HDEOs will suffice? To what end are you proceeding that either a PCMO or HDEO cannot achieve individually? You seem to want to be able to create a magical fluid; it may or may not be able to be done. Or, more likely, there is already a lube out there that will suffice. Are you willing to consider the fact that there is probably a product already in a bottle on the shelf at W/M that will do a great job, with less grief and guessing than your witches-brew?
I'll concede that what you are currently doing probably isn't hurting anything. But it's probably not achieving anything special in terms of real unique capabilities, either. Just because you can do something, doesn't mean you should do that something, or that there is any tangible benefit to doing that something.
Stop. Regroup. Reconsider. Analyze. Research. Decide.
Then act.
