The average price of a gallon of regular self-serve gasoline in San Diego County fell Tuesday for the 20th straight day, falling 1.1 cents to $6.20.
The average price has fallen 17.3 cents over the past 20 days, including four tenths of a cent on Sunday and Monday, according to figures from the AAA and the Petroleum Price Information Service. The streak of declines follows a series of 19 increases in 20 days totaling 35.5 cents.
The average price is 6.6 cents lower than a week ago and 5 cents lower than a month ago, but $1.918 higher than a year ago.
The price decline continues despite a gas tax increase of 2.8 cents per gallon that took effect on Friday.
The national average price fell for the 21st day in a row after an 18-day streak of increases, falling seven tenths of a cent to $4.80. It has fallen 21.6 cents over the past 21 days, including half a cent on Monday, after rising 41.5 cents during the 18-day streak of increases.
The national average price is 8.1 cents lower than a week ago and 4.8 cents lower than a month ago, but $1.666 higher than a year ago.
City News Service contributed to this article.