RE: First tank of fuel...HOLY CRAP.......
Yes for sure the break-in thing. Worse thing for a new engine is heat . Idling is not good either. I build engines for racing in boats and cars. I understand about breaking in a new engine as well as octane on fuel. My instructions sain premium fuel. So not knowing the specs on the compression and timing I did not want to take a chance on detonation.
Synthetic oil will come after a few gallons or break-in.
Aleck