Unless you have documentation to back up the ZDDP in the
oil.....then all of this talk is meaningless.
50% more of what???.....
Most
oil company's don't publish there numbers of ZDDP.....If they do....at least you have something to compare to.
And viscosity is not what the numbers stand for.......it's the molecule ie; 5W30 is 5 weight molecule = Winter = 30 weight molecule.
We run 0W50 in our Kinetic FE motor and that is why most of the NASCAR guy's run the same.....quick oiling on start-up and 50 wt molecule when hot.......and it maintains the structure of the
oil for a long time......and has been tested many times.
So get the numbers so you can do your own comparison for you own application.....