Well the CI-4 rating is best to look for. Mystik JT-8, Chevron Delo and Mobil Delvac are a few that should still have that rating. Also Valvoline VR-1 racing. Natch GM's EOS and or Crane's break in lube added for break in. I'm far from a
oil expert but just things I picked up reading. But with a new FE project in the works...this is a area of concern for me as well.
Glenn.