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E-15 fuel blend means cheaper gas but could cause 'extreme problems' for older vehicles

An open fuel door on a white car with a sticker on the inside that shows engine compatibility with E-5, E-10 and E-15 ethanol-gasoline blends
Kenneth Cheung
/
Getty Images
A label inside this car’s fuel door shows engine compatibility with different ethanol-gasoline blends.

In an effort to bring down fuel prices, the Trump administration has approved a cheaper blend of gasoline known as E-15.

Many Arizona stations began selling the fuel Friday, but experts are warning drivers to be cautious.

AAA Mountain West spokesperson Doug Johnson says the blend has more ethanol and less gasoline, which could cause problems — especially in older vehicles.

“It could create extreme problems for your fuel line and for your engine,” Johnson said. “Think about putting diesel into regular gasoline. There’s just complications that would happen that you just don’t want to deal with. So, again, you really need to check your owner’s manual.”

Johnson says in addition to being about 10 to 15 cents cheaper than regular gas, the E-15 blend can provide slightly better mileage in some vehicles.

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News director Chad Snow joined the KJZZ newsroom in 2016.