In a medium bowl, combine soy milk and oats. Let stand for 10 minutes.
Meanwhile, in a large bowl, combine all-purpose and whole wheat flour, baking powder, and salt. Stir oil into oat mixture and add oat mixture to dry ingredients. Stir just until flour mixture is is moistened. Batter should be lumpy.
Spray non-stick skillet with cooking spray, heat over medium heat until hot. Pour batter by scant 1/4 cups into skillet and spread to form 3 1/2-inch pancakes. Cook 2 to 3 minutes per side.