The average price of gas in Santa Rosa keeps on sinking and now it’s lower than a year ago.

AAA reports that the average price for regular gas fell to $3.818 a gallon on Tuesday, down about 2 cents from the day before ($3.837), down about 16 cents from a week ago ($3.974), down about 45 cents from a month ago ($4.267) and down about 4 cents from a year ago ($3.856). Santa Rosa’s average fell to less than $4 on June 17.

Patrick DeHaan, a senior petroleum analyst for gasbuddy.com, said recent bad economic news and predictions are driving oil prices and, thus, gas prices down much more than anticipated just a couple of weeks ago.

So much so that, barring some crisis, he expects prices in California to fall to $3.40 to $3.80 in most cities, with some dropping to near $3 later this summer.

In checking gasbuddy.com, where readers report low prices, at least four Santa Rosa stations Wednesday were selling gas for $3.59 — the lowest reported: Costco and three stations near Todd Road and Highway 101 — Shell, Tower and Rotten Robbie.

AAA’s Daily Fuel Gauge report showes that among the California cities surveyed Yuba City had the cheapest average gas at $3.711 while San Francisco had the highest at $3.963. The state average was $3.812.

South Carolina had the lowest average at $2.975, while Hawaii was the highest at $4.295.

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