Oilers did win against Penguins in the McDavid era. Only McDavid didn't play when Edmonton won. McDavid was injured when the win happened.
https://www.hockey-reference.com/box...511280PIT.html
https://www.youtube.com/watch?v=YyqvLNlNQNg
87 > 97 thus far. When will McDavid learn to show up against Crosby?