Nurse cut it to 4-2 at 3:41 of the third period. He jumped into the rush, took a pass from Jesse Puljujarvi and shot over Wedgewood's shoulder.
Benn restored the three-goal lead with a power-play goal that made it 5-2 at 4:01. A point shot from Miro Heiskanen hit traffic in front and bounced to Benn at the side of the net for a tap-in.
"I thought we lost too many 1-on-1 battles and stick battles," Oilers forward Derek Ryan said. "They're a good team, they're a resilient team, they seemed to continue to get that one extra goal when we felt like we were getting back in the game, and that's what it's going to be like when you play against top teams. It's a good wake-up call for us."
Benn scored his third goal for the 6-2 final at 12:33 after keeping the puck on a 2-on-1.
"I thought today, that's a team loss, it's not on one person," Edmonton coach Jay Woodcroft said. "We got out-everything tonight. We, as a group, did and to me, of the 12 games of the year that we've played, we laid an egg tonight and that's the first time I've seen that where we didn't have it in all facets of the game, and to a man we weren't good enough."
NOTES: Benn has seven hat tricks, third most in Stars/Minnesota North Stars history (Dino Ciccarelli, 14; Bill Goldsworthy, eight). … Hintz and Heiskanen each had two assists. ... McDavid had an assist to extend his point streak to six games (15 points; seven goals, eight assists) … Draisaitl has 15 points (five goals, 10 assists) during a seven-game point streak … Dallas was 2-for-3 on the power play; Edmonton was 1-for-6.