Gas mileage guage screwed up?
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This is a discussion on Gas mileage guage screwed up? within the General Maintenance, Troubleshooting & Accidents. forums, part of the Tech & Modifying & General Repairs category; My gas mileage gauge keeps changing readings. I have been driving it the same for a while: steady as she ...

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    Gas mileage guage screwed up?

    My gas mileage gauge keeps changing readings. I have been driving it the same for a while: steady as she goes. I don't have a job right now, so I can't afford to tear around and waste gas.

    Normally it shows my average at around 19 mpg. Yesterday, with no change in driving, it dropped to 15.6 If I wanted Jeep fuel economy I would have gotten a Jeep or the FJ Cruiser. What's going on with my car? I change the oil pretty regularly, I change the air filter almost every time I do the oil (I look at it first to see if I need to), my tires are at the right pressure, and I use 93 octane gas. What's going on?

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    Registered User oguitar's Avatar
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    Don't go into boost if you want to save gas. That is if your car is in perfect running order. Hard to guess whats wrong with your car over the internet.

    How old is the 02 sensor? Got any mods? Need more info.
    Life is like riding a bicycle in order to keep your balance you must keep moving.

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    The car is stock, no mods. It hasn't had a tune up, ever, but a mechanic I took it to said a tune up is a rip off if there's nothing wrong with it and Subaru has had the car a few times and confirmed it's running in perfect condition.

    How do i avoid boosting?

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    Master Baiter EJ257's Avatar
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    What mileage do you get when you calculate it manually?

    Quote Originally Posted by teikyo30
    How do i avoid boosting?
    With a light right foot.
    2005 WRX STi (Mods | Virtual Dyno)

    Resident Tuner @ WTF Tuning

    "Never trust anything that bleeds for a week and lives ..."

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    Quote Originally Posted by EJ257 View Post
    What mileage do you get when you calculate it manually?



    With a light right foot.

    Umm, I don't calculate it manually. I go by whatever the computer says and add gas as needed.

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    Master Baiter EJ257's Avatar
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    Quote Originally Posted by teikyo30
    Umm, I don't calculate it manually. I go by whatever the computer says and add gas as needed.
    Mileage computers are often times off; try calculating mileage manually. When you fill up, reset your trip odometer. Next time you fill up, divide mileage / gallons.
    2005 WRX STi (Mods | Virtual Dyno)

    Resident Tuner @ WTF Tuning

    "Never trust anything that bleeds for a week and lives ..."

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