A word of caution, the level of ZZDP has been decreasing over the last several years. If you are running a higher lift cam, pay attention.
The newer Oil specifications are only interested in fuel mileage and the potential for contaminating the catalytic convertors.
If you are running an older or modified engine, the current Oil's may not provide the protection You think.
Your Owners Manual specifies the Oil properties that that engine was designed for, Pay attention to that...