I have the 20x9s on my Vert, I love them. I personally think it handles better than the 19" that I drove and you get better tires. No issue with noise or roughness IMHO
Apparently my wording has some people on edge.
So,
I am sorry you car is broken. My car seems fine under all accelerations events i have done to this point. It has a May 2024 build date, incase that is helpful.
I have put the car in Drag Strip mode once and during the shift the tires spun...
The motorcraft 5w-30 synthetic blend from Amazon. I usually go by the mfg suggestion. This is just a cruiser so i have no doubt it will be just fine.
And i follow the DIC for change intervals