Wolfsburg won their 10th straight game by beating Bayer Leverkusen 2-1 on goals from Grafite to remain three points clear of defending Bundesliga champions Bayern Munich, who won 1-0 at Arminia Bielefeld.
Grafite converted a penalty and then notched the winning goal in the 85th for a league-high 22 goals. Luca Toni scored in the second half for Bayern.
"Our target at the start of the season was to finish in the top five and that hasn't changed, even with this win," Grafite said. "We have to think from game to game and there are still six games left."
Hard fight
Wolfsburg now have 57 points and Bayern 54, with six games remaining for both sides.
"It was a hard fight, they dominated us in the second half and were clearly the better team," said Wolfsburg's coach Felix Magath, who won two titles with Bayern. "Being in the lead puts you under a lot of pressure, everyone wants to beat you. We were lucky to win. I still think Bayern will win the title, they won 1-0 today and that's their strength, getting the results they need."