So this quickly devolved into our 10001st oil thread as expected.
Regarding diff types of oil synth vs Dino. If here talking about a dd car, even the z, IMO it doesn't matter and as long as you change the oil at regular intervals, you should be able to get 250k miles no problem assuming no manufacturing defects.
If you track, then that's when oil types, diff weights of oil etc start to matter IMO.