Lucas Response To Zinc Additive

Thanks for the responses

My F350/ 390 wiped out a cam and set of lifters during the summer and now of course I do not want to go down that path again.

5200 PPM does seen high. Is about 1500 PPM thats all reqiured?

Does not Zinc included oil blends have about 1200 PPM per quart? So 5 quarts / liters have a total of about 6000 ppm in total during each oil change??

Damm thought I had an answer to this.