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At a very high level, oil engineers when asked about antique engines, will tell you that you need detergents and additives to prevent the build up of bad chemicals.
Really kind of a no brainer once you understand the detergents do not break up sludge. They only keep the very small stuff in suspension to prevent sludge. Additives keep things like sulfuric acid from forming.
The other thing to understand is the modern oils do not really break down. The additives get used up, but they still lubricate. You should NOT change your oil every 500 miles as that is a waste of resources. A few thousand or a few years would be better.
Now there may be something to using oils made for compression ignition (diesel). The A engine and the diesel engine share some characteristics that make logical sense.
In experience, just about any oil works well.
Engines will fail not because of the oil, but because they were not built right to begin with, so do not fret much.
Yes, I left out a bunch of details. Loose engines vs new engines vs broke in engines there are some considerations.
Also,
We have like 30 engines we have taken apart and it is interesting how well oiled they can be. One engine I had owned like 15 years and it was sitting in a barn for a long time before me. When it was tore down there was still a good coating of oil on the bearings. There would have been a wet start even if you cranked and started right off.