Zinc additive?

[Smith97454]

Yay or Nay? I know to break in a cam on a car engine it is recommended a lot of the time to use ZDDP additive until the first oil change. What about a Small mower engine? I just bought a Gravely Zero turn with a 25hp Briggs engine. Was curious if I should drop a little additive in? Also what about with every oil change?

Thanks
Aaron

 

[logan01]

You don't need it. Modern oils have anti-wear additives to replace the zinc, phosphate, etc.