MA gas prices up by a penny, expected to fall

MA gas prices up by a penny, expected to fall

In many cars and SUVs, Premium gasoline is "recommended", but not "required".

AAA tested a variety of vehicles that recommend, but do not require the use of premium (91 octane or higher) gasoline.

AAA estimated consumers wasted almost $2.1 billion dollars fueling vehicles with 91 or higher octane gasoline a year ago.

Across the country, the largest changes in average gas prices by state: DE (-5 cents), Colorado (-5 cents), ME (-4 cents), Oklahoma (-4 cents), Vermont (-4 cents), OH (+4 cents), Kentucky (-3 cents), Missouri (-3 cents), SC (-3 cents) and South Dakota (-3 cents).

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Vehicles that require premium gasoline should always use it, AAA said.

In 2015, drivers wasted $2.1 billion by paying for premium fuel when their vehicles were created to operate on regular, according to the AAA.

Most vehicles showed a modest improvement in fuel economy and performance. But past year, almost 1.5 million new vehicles sold in the United States merely recommended, not required, premium fuel.

The research suggests premium fuel works best on engines calibrated specifically for high octane. Back in 2009, premium cost much less - only about 10 percent more per gallon, according to AAA, which conducted the study in partnership with the Automobile Club of Southern California's Automotive Research Center.

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AAA pointed out that premium fuel can cost $0.50 more than regular nationwide.

Because prices for premium vary greatly across the US, both AAA and GasBuddy urge drivers to shop around for the best prices.

AAA reported that over the past four weeks gas prices have been on steady decline across the country.

States with the highest average gas prices: Hawaii ($3.29), Alaska ($3.22), California ($3.15), Washington ($2.91), OR ($2.78), Pennsylvania ($2.73), Nevada ($2.72), CT ($2.69), NY ($2.67) and Montana ($2.62). DeHaan said the Midwest is now seeing the largest gaps in prices between regular and premium. It costs about 50 cents more per gallon, according to AAA.

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The company's testing found that paying for premium is not worth the extra money unless your vehicle actually requires it. The Editorial department is independent of Cars.com's advertising, sales and sponsored content departments.

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