Update on 03 5.7 1500 230k miles. Now have about 500 miles on Redline 5-30. The experienced member warnings were correct. 1. With that many miles, changing from RP to another Tier 1 oil like Amsoil SS or Redline "may" not be a good idea. 2. When you first change to Redline, you may get a mild rotating noise on start up idle. The molly in RL needs time to coat the cam and lifters. I did find that start up internal noise did present right after the oil change. Today, no noise of any kind at start up, idle or full operating temp. Oil pressure is up 2-3 psi. Head and block temp down 4-5* from RP. At the same time, I stopped using Baldwin filters and now use either Amsoil or RP Teir 1 filters. Confident I will get another 100k out of this 5.7
To all of the members who have shared 1000's of post facts, reports, information and Q and A,,,thank you.