Gasoline prices down slightly in nation, up a penny in Phila.

While the average price of a gallon of gasoline fell slightly nationally, and held steady in South Jersey, it rose by penny overnight in southeastern Pennsylvania, AAA Mid-Atlantic said this morning.

The Philadelphia price of $3.10 per gallon on average is up 3 cents over the last week. The South Jersey average stayed at $2.89, a penny higher than a week ago. And the national average, $3.09 is 2 cents below the week-ago price, the auto club said.