Wed Aug 22, 2007 8:52PM EDT SAN FRANCISCO (Reuters) - A group of California gasoline station owners filed suit in U.S. federal district court in San Francisco accusing three oil industry giants of fixing gasoline prices across the United States from 1998 to 2001. The suit filed on Tuesday claims that Texaco -- now owned by Chevron Corp. -- and U.S. units of state-owned Saudi Aramco of Saudi Arabia and of Royal Dutch Shell Plc colluded to set gasoline sold to 23,000 Texaco and Shell stations at artificially high prices. Chevron is named as a defendant because it took over Texaco. http://www.reuters.com/article/ousiv/idUSN2246365320070823