I wouldn’t know why running a high quality motor oil or synthetic, suited to your application, couldn’t produce the same results. There are so many specialty oils on the market now, there is something for everyone. I run oil with zinc in it in my old stuff with flat tappets. The racers use it.
Motorkote doesn’t seem like too expensive an experiment. $25 bottle at Amazon treats 2 V8 engines. Can’t hurt to try and see if you notice a difference.
http://www.amazon.com/MotorKote-MK-HL32-06-32oz-Hyper-Lubricant/dp/B000EGAM0I
Thanks, Laz. That's good advice.