Wipe off the area on the oil pan around the drain plug with a clean rag or towel.

Reinstall the drain plug and tighten it by hand first.

Use a box end wrench to tighten the drain plug until it is snug, but do not over-tighten it.

Over-tightening the drain plug may strip the threads or crack the oil pan. You can always go back and tighten the drain plug later if you notice any leaks.