Ben Oglivie and Ted Simmons each drove in three runs and Milwaukee had two six-run innings on the way to the second-game rout and a split of a doubleheader in Detroit.
In the first game, Darrell Evans' seventh-inning grand slam broke a 3-3 tie in the Tigers' victory.
The Brewers took a 1-0 lead in the second game on Simmons' RBI single in the first inning, then got to starter Randy O'Neal (5-4) and reliever Juan Berenguer for 12 runs in the second and third innings.
Oglivie, the first batter Berenguer faced, hit his eighth homer of the year, a three-run shot, in the second. Simmons also had an RBI with a single, and two runs scored on a bases-loaded error by shortstop Alan Trammell.
Milwaukee extended its lead to 13-1 in the third. Paul Molitor, Robin Yount, Cecil Cooper and Simmons had consecutive run-scoring hits off Berenguer and Bill Schroedrer and Paul Householder accounted for the final two runs with a bases-loaded walk and a groundout.
Cooper homered for the Brewers in the fourth to make it 14-2. Marty Castillo and Trammell hit bases-empty homers for the Tigers.
With the score tied at 3 in the opener, Rick Waits (0-2), the second of three Milwaukee pitchers, walked Trammell and Kirk Gibson to lead off the Detroit seventh before being replaced by Bob Gibson.
Following a sacrifice and an intentional walk, Evans hit his second grand slam of the year and 24th homer overall.