I've had my 2016 Mustang a year now.
At 1800 miles, it started giving me warnings to change the oil soon. At 1825 miles, it started to run a little rough and get a little jerky. I changed the oil at 1850 miles and all is good now. That seems like a pretty short oil change interval, but it does use oil pressure to open the valves further/longer for the variable valve timing, so maybe that has something to do with it.
The act of changing the oil itself reminded me a lot of changing the oil on my 944s (that's plural, though one was a 944S). The oil drain plug takes a 15mm socket. I thought it was a nice touch that it is to the rear of the oil pan, so it drains well when jacked up. It apparently takes 8 quarts of oil. Getting to the oil filter is a little tricky, and I had to remove some underbody panels to get to it. It took me about 2 hours the first time, but that was because I had to look up where the oil filter was online, run out for more oil (I bought 5 quarts), and figure out which tools fit which fittings (oil filter, oil drain plug, underbody panel bolts, etc.). Next time ti should take about 30 minutes.
