As most of you have figured out I've been doing this for some time. I've used/tried most of the oils available over the years. Price point aside; I have to say I very much respect how Liqui Moly does things. Mage in Germany, they're in constant contact wit the OEM's in Europe. The were the first in Europe (IIRC) to address the LSPI issue on turbocharged cars.
They addressed the very issue discussed here often with low drag rings, and formulated an oil to combat it: Leichtlauf 5-40.
I'm talking with their engineers 4 or 5 times a year with application and/or oil change formulations etc. and they are always willing to help. Now that most of what comes into my bays anymore is turbocharged, the L-M oils are what I use most anymore.
Great company/oil in my opinion.
(And in case anyone wonders, I'm just a regular customer. I buy it like anyone else.)