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What kind of gas does a Subaru Impreza take?
I just bought a Subaru Impreza and a fellow owner mentioned the high price of premium gas. I asked the dealership and he said it ran off “87-octane fuel”. What does this mean and what kind of fuel should I put in my Impreza?
Patrick Price · Updated on
Reviewed by Shannon Martin, Licensed Insurance Agent.
Congratulations on your new ride! Taking care of your investment is a great idea, and that starts with the right fuel. The Subaru Impreza uses regular, unleaded gasoline.
So, what do the gas octane ratings mean? Here’s a quick breakdown of what your dealer is referring to:
- 87 octane is generally classified as Regular or Unleaded gas, the lowest grade
- 89-90 octane is generally classified as Midgrade or Super gas, the middle grade
- 91-94 octane is generally classified as Premium or Super Premium gas, the highest grade
Octane rating numbers refer to how well the fuel resists making secondary combustions—or “knocks”—when it’s being ignited. This “knocking” puts pressure on the car engine pistons and burns less efficiently.
While this knowledge might tempt you to spend more at the pump, premium gas is rarely worth the price for vehicles that run on regular gas. Your Impreza will do just fine with 87-octane, Regular Unleaded gasoline.
View full answer
- Gregory R.
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