Fuel prices during the first two weeks of the month were trending down in most geographic areas of the U.S., according to the U.S. Energy and Information Administration, which publishes weekly assessments of fuel prices.
For the week of December 12, the highest prices for diesel were reported in California, at $4.12 per gallon (including taxes). The lowest prices were recorded along the Gulf Coast, at $3.79 per gallon. The overall U.S. average was $3.89, which was down almost 4 cents from the prior week, but up about 66 cents from one year ago.