How many times can you reuse the driveshaft drain plug washer/gasket?

[Zorlac]

Till it leaks

+1

 

[Spud]

The thing holds over a gallon of oil! So, if a drip started, I'd re-do it, and have plenty of time to notice it. I'm on my 4th oil change w/factory crush washer, and will keep reusing it as long as it seals...