Originally Posted by 6MT

It's not "rubber". Nissan uses a brass crush washer on their drain plugs. It is NOT re-usable. They are around $1. So if someone doesn't replace it, they're either stupid or don't know that it can't be re-used.

I just did my first oil change last night. It was very easy. Just remove 16 bolts and 3 fasteners, drop the splash pan and it's so easy that I didn't spill one drop.