Frank,
Klotz is still available. They have a range of different oils. Check it out at:
http://www.klotzlube.com/radio_control_.htmlI am using both Benol in certain engines for the castor content and the original techniplate in ball-bearing engines with modern materials. Generally, I use a mix in the rest. I have ordered the Benol by the case, direct.
As to your other enquiry, there are many, many opinions on oils, percentages, best mix of products, etc. There is a really good article out there somewhere that I recall that discusses the nature of lubricants for model engines. I will see if I have it saved somewhere. By all means, read Randy's explanation of fuels.
I have heard folks use Motul in Europe. You can see "advertisements" on many racing cars for the brand. I don't think you are going to be able to "not discuss" brands, because most of the oil compounding companies are not going to tell you exactly what is in their oil, or how it was processed. In any event, they are all going to claim to have a unique additive package. Those additives may or may not help in our application.
I have doubts that using a synthetic crankcase oil designed for auto engines would be the most suitable for burning in a model engine. That said, I certainly never thought of doing so, have not looked up data sheets, have not tested it, and can't say it won't work. I'm sure you can get an engine to run using it, but what are the secondary considerations like wear rate, plug fouling or poisoning, etc. Let us know if you try it!
Dave