Quaker Oats Co. said Monday that it will focus more of its marketing effort on its whole-grain oat products. The new campaign from Quaker, owned by PepsiCo Inc (PEP.N), includes television commercials, print and digital ads, billboards, bus and taxi signs, and an event where Quaker employees will give away a million bowls of oatmeal for free. Television ads will start on March 16, with print ads rolling out next month.