A consumer group is calling on the state attorney general to investigate what it calls a gouging of customers at the gas pump.
Consumer Watchdog says by keeping supplies artificially low, refiners keep prices high and are making a killing.
Chevron Corp. said Friday that profits rose 4.2 percent in the first quarter as it sold oil for higher prices.
Chevron reported its profit jumped 43 percent in the second quarter as higher oil and gasoline prices made up for a decline in oil production.
California Senator Barbara Boxer is looking to reign in big oil companies to help with rising gas prices around the country.
Bay Area drivers recently found themselves paying more at the gas pump than they had in the past six months. It was particularly difficult news to stomach as consumers prepared to begin their holiday shopping for friends and loved ones.