Cam lobe discoloration normal?

I don’t get it. The amount of money we all spend building these motors and then try to save a few bucks by buying some main stream mass produced oil for modern cars in our vintage junk just kills me. Most of us drive these cars lass than 5000 miles a year, this one oil change a year. What’s a case of Penn Grade cost? Less than 100 bucks for 2 oil changes plus some to top off.
Penn Grade or Gibbs Driven. Which both can be gotten from Summit or chity Amazon. Amzoil is also good.