Same for me, the oil drain plug is somewhat fragile, my van as 140k km and
it was strip for a long time before I decided to drilled and tap a new
heli-coil.

The new heli-coil started leaking after only 5000km!!! I remove the
heli-coil and put a new one with a LOCKTITE product and it still leak a bit
today. The solution is to apply a small coat of soft silicone on the drain
plug each time I do an oil change.

Be very careful when tightening the bolt.

Regards, Ben