Here's a silly question

I have always used synthetic, mostly Mobil 1, in my trubo vehciles. Three of them in the past 20 years with a total accumulated milage of 461,000 miles. Never was into the motor or turbo on any of them.

I have been using dino oil, what ever name brand was on sale, in my other cars. I am now using Shell Rotella or Mobil Delvac in the Barracuda since all the discussions regarding additives to protect flat tappet cams not being in the modern oil.