I've been running that same
Amsoil in my Doug Nash Richmond 5 spd with absolutely no problems. I called Richmond and they recommended Redline but said
Amsoil would be just as good. Think that may be because they have some deal with Redline.
I've been using
Amsoil in all my vehicles and in everything that holds
oil for over 20 years. Started using it when I lived in Anchorage because my Chevy Blazer 350 just barely turned over in the mornings during the winter. Had to be doing damage during warmups. Never looked back. Been using synthetics since then.
Paul