MY OIL DRAIN PLUG IS PRETTY CHEWED-UP. tHE LAST TIME I CHANGED MY OIL I HAD TO USE A PAIR OF VICE-GRIPS. THE HEAD OF THE PLUG IS SHOT. HAS ANYONE REPLACED THEIRS. I DID'NT KNOW IF I COULD GET ONE AT NAPA OR WHETHER IT MIGHT HAVE A FINE THREAD SIZE OR WHAT!