RIVERSIDE, Calif. -

The average price of a gallon of self-serve regular gasoline in the Inland Empire fell one-tenth of a cent today to $4.146, one day after rising by the same amount.

The average price in Riverside and San Bernardino counties is 1.3 cents more than a week ago, 28.8 cents higher than one month ago and 21 cents greater than one year ago, according to figures from the AAA and Oil Price Information Service.

"Local gas prices have risen by nearly 50 cents since July, when Southland motorists were paying about $3.70 a gallon on average," said Jeffrey Spring of the Automobile Club of Southern California.

"The year-to-date average price for California gas is $4.04, 23 cents above the 2011 annual average price of $3.81."