So many choices for gasoline.

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Today in my daily Ag Newsletter.

E15 Could Trim California Gas Prices
California’s legendary high gasoline prices could be knocked back as much as 20 cents per gallon if the state allows the sale of E15, a new study revealed. Increasing the volume of ethanol to 15% from the current 10% would increase the state’s overall fuel supply and reduce greenhouse gas emissions.
 
The projected savings would amount to around $200 for a typical family and would include an appealing octane increase from the current 87 to 88. The study was released this week by the Renewable Fuels Association and was conducted by economists at UC Berkeley and the U.S. Naval Academy.

Oil or windscreens were your other options.  

But, on a serious note, Biodiesel has been displacing regular diesel on the west coast for a few years.  Also, Europe has been producing more biodiesel than they can use, lowering the price.