There is a ton of different brands of oil on the market, so use what you want to use and send it. We have all said our piece, do do you. Run the best oil you can afford, as you most likely have a ton of money in your motor and want to protect it for the one oil change a year. It’s the old adage, 100 dollar helmet for a 100 dollar head.
This is what I run in my 340’s and we use in the vintage Formula 1 Cosworth DFV motors my brother builds that cost more than an A body for a rebuild.
I’ve used this oil for well over 40 years and several name changes. I did a search on this a few months ago and bought a couple cases. I’m sure glad I grabbed it before the price went up.
