In my race engines usually use Valvoline vr-1, street cars with older cast iron engines I use shell rotella. I am going to try some amsoil in my street car after reading this log post from another forum.

http://speedtalk.com/forum/viewtopic.php?t=28365

http://speedtalk.com/forum/viewtopic.php?f=1&t=36565

Last edited by jwb123; 02/14/18 01:30 PM.