Gas prices plummet in California over 3-month period

California gas prices have been sliding lower over the past three months, a reflection of falling oil refinery costs and a new state price-gouging law.

Gas prices still remain the highest in the country but have dropped 78 cents per gallon since mid-April on average, according to the California Energy Commission, the state’s primary energy policy and planning agency.

The average price for a gallon of regular gasoline in California was $4.64 on Friday, while Golden State drivers were paying $5.42 at the pump back in April...