Photo by Vince Taroc.

Photo by Vince Taroc.

The national average price of a gallon of regular unleaded increased one cent to $2.53 per gallon, and about half of the country saw increases at the pump with some states seeing as much as a nine-cent increase for the week ending March 5, reports AAA.

Gasoline prices are eight cents cheaper than a month ago, and 22 cents more expensive that a year ago.

About 63% of motorists can fill up for $2.50 per gallon or less, even though 25 states saw a weekly increase.

"2018 has seen fluctuating crude oil prices, strong gasoline demand and new U.S. oil production records creating a volatile gas price market from month to month for consumers," said Jeanette Casselano, a AAA spokeswoman. "Typically, March brings more expensive pricing as days get longer, weather gets warmer and refinery’s gear up to switchover to pricier summer blends."

States with the highest change include Ohio (up nine cents), Indiana (up eight cents), Georgia (up five cents), Alaska (up four cents), Kansas (up four cents), and Michigan (up four cents).

States with the most expensive gasoline include Hawaii ($3.50), California ($3.35), Alaska ($3.06), Washington ($3.00), and Oregon ($2.90).

Meanwhile, the average price of diesel fell 1.5 cents to $2.992, which is 41.3 cents higher than a year ago, according to the U.S. Energy Information Administration.