Retail gasoline prices dipped slightly over the past two weeks, but consumers may see higher prices soon if wholesale prices continue to rise, an oil industry analyst said. "Despite the violence in both the stock market and the Persian Gulf, the U.S. oil market is manifesting relative calm," said analyst Trilby Lundberg, who surveyed 13,000 service stations nationwide. Average gasoline prices dipped .14 cents a gallon during the past two weeks, bringing the pump price for all grades, self-serve and full-serve, including taxes, to $1.006 a gallon as of Oct. 23, Lundberg said. The decline was steepest on the East Coast, while prices rose in many other locations, she said. During the same period, the Lundberg Survey showed wholesale prices up an average of .39 cents a gallon, which may be passed on to motorists, she said.