Aha, well that makes sense. I couldn't figure out why they would go to the trouble of drilling the oil drain plug. But this makes sense if it saves a damaged oil pan. The oil pan is aluminum, so ruining the threads could be easy.
I've gone to the quiky lube exactly once because I had a free coupon. They shorted me a quart and I was in a hurry for the weekend and didn't check. I proceeded to tow 2 snowmobiles for 300 miles with a 4 cylinder pickup. No serious damage, but never again. I've changed my own oil since I started driving. That's at least 43 times in my Dakota!!
97 328iS, Manual, Stock