MUSKEGON, Mich. - The $50,000 Michigan Oaks on Tuesday at Great Lakes Downs has attracted six Michigan-bred 3-year-old fillies, including the first four finishers in the $50,000 Ann Arbor Stakes here Aug. 19. A 1 1/16-mile race, the Michigan Oaks will be run for the 33rd time and is the eighth race on the card, which begins at 5:10 p.m. There will be no exotic or show wagering, because there are two stable couplings in the race.