Says the guy that needs to read up on how the government mandated the removal of Zinc from petroleum based oil products. Try going through the break-in procedure for a flat tappet camshaft combination w/o adding an “ oil additive” with the missing Zinc.....you’ll be taking the engine back out with an oil pan full of wiped out cam journals.Oil additives are so 1970. With synthetic and semi synthetic oils today it is not needed.