I think I heard every possible answers over the years.

What is the truth, exactly?

Two simple questions:


1. How much Oil overfill is safe and desirable?

I heard everything from 9.5 quarts to 12 quarts total... How much is too much? (touches the crank and starts foaming)



2. What type of oil, and more specifically high levels of zinc, ZDDP, other additives... or not ?

Is the Z-Rod from Amsoil (among others) a benefit for the Viper engine... or not?


Thanks in advance for the inputs