The average price of a gallon of self-serve regular gasoline in Los Angeles County dropped six-tenths of a cent Tuesday to $4.628, its lowest amount since Aug. 30.

The average price is 3.8 cents less than one week ago and 10 cents lower than one month ago but 8 cents more than one year ago. It has decreased $1.865 since rising to a record $6.493 on Oct. 5, 2022.

The Orange County average price resumed dropping, decreasing 1.4 cents to $4.57, one day after a run of 12 decreases in 13 days totaling 10.7 cents ended with an increase of a half-cent.

The Orange County average price is 5.2 cents less than one week ago and 13.2 cents lower than one month ago but 9.6 cents more than one year ago. It has dropped $1.888 since rising to a record $6.458 on Oct. 5, 2022.

The national average price dropped for the fifth consecutive day, decreasing eight-tenths of a cent to $3.044. It has dropped 2.7 cents over the past five days, including one-tenth of a cent Monday.

The decreases follow a three-day streak of increases totaling 3.4 cents.

The national average price is of a four-tenths of a cent less than one week ago, 8.9 cents lower than one month ago and 8.6 cents below what it was one year ago. It has dropped $1.972 since rising to a record $5.016 on June 14, 2022.

“The possibility of a U.S.-China trade deal could lift oil prices on optimism that it would increase trade and reduce tariffs — potentially keeping the national average slightly above the $3-per-gallon mark for a couple more weeks before slipping back below $3 ahead of Thanksgiving,” Patrick De Haan, head of petroleum analysis at GasBuddy, which provides real-time gas price information from more than 150,000 stations, said in a statement released Monday.