No, it was the EPA ( and Transport Canada; developed jointly) who mandated the current minimum new car warranty on emissions equipment of beyond 100,000 mi (cant remember the Actual number but I believe its 120,000).
Where the auto makers come in is their data which shows ZDDP contributes to premature catalytic converter wear; the mandatory warranty cant be implemented without either resigning themselves to replacing every cat under warranty or having the SAE (automakers + oil companies are members) introduce a new oil spec with an acceptable reduction for ZDDP in roller tappet engines.