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1997 fuel


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I just bought a '97 legacy gt. It did not come with a manual (I ordered one off ebay, it hasn't arrived yet). I just want to make sure that this car really does run on 87 octane fuel.


I have not found anywhere written on the car that says what to use.


From a couple of searches I have made it seems that it runs 87 but I just want to be absolutely sure.

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Thanks for the info.


I have another question and I don't see the point of making a new thread since its also fuel related:


When I remove the gas cap I hear a hissing sound. It sounds like there's a fairly strong vacuum forming in the gas tank.


Is this something I should be concerned about?


I don't think the gas cap is original. I don't know if that could be the source of the problem.

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Yup, I get this also. It is actually a good thing. It means that you're gas cap is doing it's job, and that the gas tank is impervious to outside atmospheric changes that might otherwise cause evaporation of the fuel in your tank, wasting gas.


It should be more pronounced with an emptier tank, but it may do it all the time based on atmospheric conditions outside the tank.

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