OEM Oil Drain Plug Washer Gaskets For Mazda Part# 9956-41-400 (amazon)
(seems identical as OEM)
Yes, I have. The first oil change was done by Toyota dealer covered by Toyota's 2-year maintenance program. 2.5 quarts of oil leaked out during the road trip from San Jose to LA! Brought back to the Toyota dealer afterwards the dealer claimed the drain plug aluminum washer is "cracked" and the oil is leaking out from there!