I'm hoping they did clean,orderly work on my son's Mustang V-6(2006). He had a major failure of timing chain guides a coupla weeks ago. They had to pull the engine to get at the bank 2 chain cassette.
Junk was in the oil pan. He barely had it running to get it to the shop.
I have advised him that when he gets it back,after running it a few minutes, he should do another oil change and filter.