The U.S. average retail price of regular gasoline increased almost 7 cents to $3.59 per gallon as of February 20, 2012, about 40 cents per gallon higher than last year at this time. Prices were up across all regions, with the largest increase coming on the West Coast due to a large 20-cent-per-gallon increase in California, the second largest week-over-week increase for the state since EIA started collecting data. The Midwest average price increased 5.7 cents to $3.46 per gallon, while the Gulf Coast price increased 4.8 cents to $3.48 per gallon. The East Coast price rose 4.2 cents to $3.65 per gallon, and had the largest increase compared to a year ago, at 48 cents. The cheapest gasoline remains in the Rocky Mountain region, where the price has been the cheapest all year and is currently $3.10 per gallon.
The national average diesel fuel price increased almost 2 cents to $3.96 per gallon, 39 cents per gallon higher than last year at this time. Prices increased in all regions except the Midwest, where the price was down about a penny to $3.85 per gallon. The largest price increase for diesel also came on the West Coast, where the price increased 4.3 cents to $4.16 per gallon. The East Coast price is a nickel above the $4-per-gallon mark and surpasses last week's price to set a record for February. The Gulf Coast price increased 2.6 cents to $3.89 per gallon. The Rocky Mountain region, where the price is $3.86 per gallon, retains the cheapest diesel in the Nation for the second straight week.