A drop of 9.3 cents a gallon brought the national average price down to $3.894, its lowest price in five months.
Highlights
Two more regions dropped below the $4 mark this week, as the East Coast sunk to $3.969 and the Rocky Mountain region dropped to $3.933.
The West Coast ($4.655) and in particular California ($5.231) are tugging at the high end of the national average range.
All 10 regions saw declines over the past week, led by a 15.7-cent drop in the West Coast-less-California region.
Gasoline continued its charge toward a sub-$3 national average price with an 8.3-cent drop to $3.053 a gallon. It is below $3 in four of the 10 regions, led by $2.547 on the Gulf Coast.