Here is a very good article concerning motor oil.
http://blog.hemmings.com/index.php/2012/10/18/tech-101-zinc-in-oil-and-its-effects-on-older-engines/

I also located the Valvoline VR1 at NAPA.
https://www.napaonline.com/p/VAR205#

Harold

Last edited by Harold46; 05/27/2016 4:56 AM.

Harold
Is a restoration ever finished?