The owner of Towne Market Mobil in this suburb north of Milwaukee shut down his pumps for 24 hours, hoping to start a movement aimed at persuading oil companies to lower their prices. "Somebody out there is making money at these prices, but not me," said Pollack, 57. "So I just thought: What can I do to help the consumer?" Yellow caution tape surrounded Pollack's six idle pumps for his protest, which drew dozens of drivers. One in a green minivan rolled down her window and shouted "Thank you!" Maria McClory, 38, drove 10 miles out of her way to...