SAN DIEGO—The average price of a gallon of self-serve regular gasoline in San Diego County rose Oct. 5 to its highest amount since Oct. 23, 2012, with further increases expected. The average price rose eight-tenths of a cent to $4.372, one day after increasing three-tenths of a cent, according to figures from the AAA and Oil Price Information Service. It is 2.1 cents more than one week and one month ago and $1.183 higher than one year ago. The average price has risen $1.145 since the start of the year because of higher oil prices and increased demand for gasoline following the end of pandemic-related restrictions. The Organization of the Petroleum Exporting Countries and a Russia-led group of oil producers agreed Monday to maintain its schedule of increasing oil production by 400,000 barrels a day each month. With the end of the possibility of doubling the increase to 800,000 barrels …