(March 2, 2023)—Since Monday, the national average for a gallon of regular gasoline has increased by a penny to $3.37, which is still two cents less than a week ago. One reason could be an increase in demand, as the cost of oil has barely budged for the past few weeks.

“Another reason is that the seasonal switch to summer blend gasoline is underway, which may account for this bounce in pump prices,” said Andrew Gross, AAA spokesperson, “This blend is designed to lower emissions during the summer and is more expensive to refine. Switching to summer blend usually adds about five to ten cents to the price of gasoline.”

According to new data from the Energy Information Administration (EIA), gas demand jumped from 8.91 million to 9.11 million barrels a day last week. Meanwhile, total domestic gasoline stocks decreased by nearly 1 million barrels to 239.2 million barrels last week. The increase in gas demand, amid tighter supplies, has contributed to rising pump prices. If demand continues to grow, drivers will likely continue to see pump prices increase.

Today’s national average of $3.37 is 12 cents less than a month ago and 28 cents less than a year ago.

Quick stats

Since last Thursday, these 10 states have seen the largest changes in their averages: Arizona (+10 cents), California (+8 cents), Florida (−8 cents), Colorado (−8 cents), Wisconsin (+7 cents), Ohio (+7 cents), Washington, D.C. (−6 cents), North Carolina (−6 cents), Georgia (−6 cents) and Virginia (−6 cents).

The nation’s top 10 most expensive markets: Hawaii ($4.87), California ($4.83), Nevada ($4.28), Washington ($4.22), Colorado ($4.01), Oregon ($3.89), Alaska ($3.84), Utah ($3.72), Idaho ($3.66) and Arizona ($3.66).