"Breaking-In"

I've mentioned before that on 19 occasions I had the experience of flying a small helicopter back to the Midwest from the Robinson Helicopter factory in Torrance, California. As I departed the factory the Lycoming air-cooled engines normally had between 5-10 hours flight time on them to insure they ran properly, didn't leak oil, etc..

Depending on winds and which model Robbie I was flying, the flight time back East was generally between 17 to 22 hours. The factory filled the crankcase with non-detergent oil for the "break-in" period.
Departing the factory they would give me 4 extra quarts of oil to insure I could keep the engine "topped off" for the trip home. That oil had a big "M" on the label to indicate it was "Mineral Oil"... (non-detergent).
Their recommendation was to use the non-detergent oil until the engine oil consumption slowed, then switch to the regular aviation detergent oil of the customer's choice. By the time I reached my destination back in the middle of the country the oil usage of the Lycomings had normally settled down so we could drain and switch oils.
THAT is the way I got comfortable "breaking-in" an air cooled engine.

I just bought a new generator to use when we go RV-ing. It has an air-cooled 312cc engine. It came delivered with NO oil in the crankcase and, oddly, NO instructions on how to break the engine in, other than warnings in BIG red letters that there was no oil in the engine and the proper amount of engine oil had to be added before starting.
So I decided to follow the instructions I've gotten accustomed to with the Lycomings. I went to my local auto parts store and asked for "break-in oil" and got a blank stare in return. No dice.
Across the street to the competing auto parts store, the clerk lead me to the paint section and tried to sell me a quart of mineral spirits!

I realize engines are manufactured to higher tolerances these days. Oil too is better, with more additives, than it has ever been. But I'd still be more comfortable running the generator's first few hours the "old school" way.

Am I just an old fuddy-duddy?
(Try to be nice now.)