Redline, Motul, Mobil, Royal Purple, all good oils, better than Wal Mart Autozone oils by a moonshot.
All of those Followed in AMSOIL footsteps.
I first tried Royal Purple and in 10 seconds I knew I would never use dead plants and animals in my vehicle ever again.
I only used RP once I went with AMSOIL and I get called every name in the book, Must mean I am doing a good thing.
I have a newly built 7.3 diesel with 3000 miles and AMSOIL 5W30 since the first start.
This engine will never see an oil change again!
Here is the first UOA at 912 miles http://www.ranchopower.com/wp-...97442-Sev1.pdf[/IMG]