Lucas Response To Zinc Additive

I`ve read that a minimum of 1100ppm is enough to protect most cams/lifters. It`s also important to have a little phosphorus in the blend as well. I`ve just been using Valvoline VR-1 which is formulated for use with flat tappet cams. I like Lucas products but I would be less than impressed with a tech that tells you to "defiantly" use "Zink" in your engine. Although I know what he`s trying to say, it just seems very unprofessional. The math is also weird, 5200ppm, and if you were to add a pint of this to your engine wouldn`t you only add 4.5 quarts of oil to your engine? Oh well, I like the idea of using oil that is already mixed.