I believe that valvoline racing oil has zddp. -----Original Message----- From: frankk12 at verizon.net Sent: Thursday, January 10, 2013 1:04 PM To: MG List Subject: [Mgs] ZDDP Has anyone found a source for ZDDP that is reasonable? I checked MOss and the shipping is 50% of the cost of the ZDDP. My local NAPA store has never heard of it. Frank Krajewski