Tossing the original crushed washer is the thing to do for sure. The original washer is easy to overlook, because it's crushed so thin & painted black like the drain plug. Others have mentioned this, but places like AutoZone have assortment packs. Living over 10 miles from town, I had bought one of these prior to my first oil change. I didn't want to make a second trip to town for a lousy washer, & I was a little uncertain on what I would need the first time doing this.
Within the AutoZone pack (M14), I would feel comfortable using the aluminum gasket, copper gasket, and the one that is a combination of metal/rubber. The nylon gaskets seems sort of thick for the shortness of the stock drain plug threads, but they may even be ok. I lean toward using the aluminum or copper gaskets, because I have had good luck with them on a different car.
I have always done my own oil changes. I have never used a Fumoto oil drain plug valve, but I am giving it some consideration. Since the drain hole is on the back side of the oil pan, I would feel comfortable using a Fumoto valve if it doesn't stick out to much below the oil pan. I would appreciate anyone's insight on that. Would one Fumoto style (for example: F106, F106S, or F106SX) work better than another on a Mirage oil pan?
I appreciate everyone's great advice on this forum! Thanks!