Reformulated Gasoline

During the first week of Oct, gas prices were falling through much of the country while spiking an unprecedented 50 cents in CA due to some unique circumstances - bad air requiring a unique fuel blend and a 'perfect storm' of refinery mishaps.
Oct 14, 2012   San Jose Mercury News
The news of the escalating gas prices was ubiquitous - local media news reports led with gas station prices that had risen 20-50 cents overnight, or stations that had closed early for lack of gas. Finally, Gov. Brown acted to alleviate the 'crisis'.
Oct 9, 2012   The New York Times - U.S.