JG wrote:
I've been using the Amsoil products for a while... quite happy with them.

I agree, I've been using Amosil oil and filters for some time now and
have had great success. Also, I recently purchased this new motor oil
software, Engine Oil Selector 2005 (EOS)
(http://engineoilselector.com/index.html) and it calculates Amsoil as
being the top-ranked oil for every SAE viscosity Amsoil makes. Pretty cool.