Does premium gas last longer?

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asked Jul 28, 2020 in Other-Cars/Transportation by Puhippo (310 points)
Does premium gas last longer?

1 Answer

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answered Jul 28, 2020 by Avarado (26,730 points)
Premium gasoline or premium gas does not last any longer than regular gasoline.

Just like regular gasoline the premium gasoline has the same storage life of around 3 months before the gas goes bad from sitting.

All gasoline no matter what type will go bad and lose it's octane and not be able to run in a car or other vehicle after around 3 to 4 months.

But when you do use premium gas your cars engines does tend to have more power and runs a bit better and some cars do get about 1 mile per gallon better in fuel mileage.

So in that case premium gas could last a bit longer because you can go a bit further on premium gasoline.

But the premium gasoline costs a bit more than regular gas so you're not really saving any money by buying premium gasoline instead of regular gasoline.

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