Moly is safe on the catalytic converter. Phosphorus is very poisonous to the catalytic converter -- hence the maximum limits on ZDDP.
Organic moly -- the kind comes with the oil, as opposed to the aftermarkets MoS_2 powders -- does not require long periods to coat the sliding surfaces. Once the engine reaches the normal operating temperature, organic moly is activated.
The moly in Pennzoil Conventional is probably junk -- a very cheap kind of moly not manufactured by Infineum, hardly effective. You probably get better protection with 50 ppm Mo of Infineum trinuclear moly than with 500 ppm Mo of Pennzoil Conventional moly. I am saying it based on my experience with Pennzoil Conventional SN 5w20 in my engine -- I didn't like its performance.
Organic moly -- the kind comes with the oil, as opposed to the aftermarkets MoS_2 powders -- does not require long periods to coat the sliding surfaces. Once the engine reaches the normal operating temperature, organic moly is activated.
The moly in Pennzoil Conventional is probably junk -- a very cheap kind of moly not manufactured by Infineum, hardly effective. You probably get better protection with 50 ppm Mo of Infineum trinuclear moly than with 500 ppm Mo of Pennzoil Conventional moly. I am saying it based on my experience with Pennzoil Conventional SN 5w20 in my engine -- I didn't like its performance.