Gasoline Stays Flat at $3.66 Per Gallon

The national average price of gasoline remained flat, declining three-tenths of a cent to $3.665 for the week ending May 19, according to federal data.

Gasoline has eased from its three-month price hike this spring, and now costs less than it did a year ago. The cost is now eight-tenths of a cent lower than a year ago, according to the U.S. Energy Information Administration.

Gasoline declined in seven of the nine regions tracked in the weekly federal data. The sharpest decline came in the Central Atlantic region, where gasoline fell 2.5 cents. The average price of regular unleaded gasoline costs at least $3.50 in 34 states, according to the AAA's Daily Fuel Gauge Report.

Meanwhile, the national average price of diesel fell 1.4 cents to $3.934 for the week. Diesel costs 4.4 cents higher than it did a year ago.