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Subaru Impreza Real World MPG Numbers

PF_FlyerPF_Flyer Pennsylvania Furnace, PAPosts: 5,893
Report your real world mileage performance here.

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  • rshollandrsholland Posts: 19,675
    So far I'm getting:

    Stop-and-go: 21.5 mph

    Highway (~ 70 – 75 mph average to NC and back): 25 – 26 mpg

    Bob
  • ateixeiraateixeira Posts: 72,587
    That's great for a green engine. Of course you're keeping it under 4000rpm, right?

    -juice
  • rshollandrsholland Posts: 19,675
    Yes, under 4K, with only a couple of quick bursts to redline in gears 1–3. :)

    Bob
  • ateixeiraateixeira Posts: 72,587
    OK, I'm getting jealous, tell me about the road noise issue again? :cry:

    -juice
  • rshollandrsholland Posts: 19,675
    He he. I'll have to swing by your place so you can get a quick "fix." ;)

    Bob
  • andmoonandmoon Posts: 320
    Finally did it. 404.5 miles and filled w/ 15.4 gallons. Spent the last tankful in my wrx wagon (Cobb stage 2) driving w/ a speed limit of 70 mph and max revs of 3200 rpm.
    Now that I know it can be done i will be back to enjoying my wrx and filling every 300 miles or so.
    I drive a used cooking oil burning diesel to work and keep the wagon for 'fun' drives.
  • ateixeiraateixeira Posts: 72,587
    I've done it once in my Forester, pretty cool feeling. Though I was running on fumes!

    -juice
  • dstew1dstew1 Posts: 275
    15.4 gallons? Wow. Was it sputtering?

    A few days ago I coasted my FXT into the gas station and put 15.1 gallons in. The last two miles of driving, it almost died on me more times than I care to count, what with the few cupfulls of gas sloshing around in the bottom of the tank.
  • ateixeiraateixeira Posts: 72,587
    Capacity is 15.9 gallons, but who knows how much of that is useable. I'm sure the last couple of gallons are sloshing around, so hope you don't get air in the fuel lines, that can burn out the fuel pump.

    The low fuel light does on with 2.3 gallons left for that reason.

    -juice
  • andmoonandmoon Posts: 320
    yes it was sputtering :blush:
  • dstew1dstew1 Posts: 275
    I doubt that the top half gallon or so of the tank is useable space.

    So, given I was sputtering, how would I know if I got air in the fuel lines, and how much does it take to burn out the fuel pump?

    Doug
  • andmoonandmoon Posts: 320
    The sputtering is the air.
    If your fuel pump still works and isn't making unusual noises, I wouldn't worry about it.
    Aftermarket pumps that fit the wrx are plentiful and not too costly.

    Now how about 1600 miles for single fill range? :)
  • ateixeiraateixeira Posts: 72,587
    If you wanna test it, just turn the key to the On position, but don't start it. You'll hear a "whirr". Subaru fuel pumps are easily audible. See if it sounds healthy to you. Usually it either works, or it doesn't, though.

    -juice
  • aarbeeaarbee Posts: 2
    I am thinking of buying an older Impreza for better fuel economy. I would have thought that the 2.2l Impreza would have better gas mileage than the 2.5l. However the government fuel economy numbers (5spd, highway) show almost no difference in mpg between these two cars. Does this make sense? Does this correspond to your own experience? How many mpg do you get in your 2.5l/2.2l Impreza?

    Thanks a lot for your help.

    RB
    1999 Impreza 2.2l (30mpg) http://www.cars101.com/impreza_archive99_01.html#99 impreza
    2005 Impreza 2.5l (29mpg) http://www.cars101.com/subaru/impreza/impreza2006.html#std features
  • ateixeiraateixeira Posts: 72,587
    I'd expect the 2.2l to do slightly better, but a much more important factor is that the EJ22 from that year is far and above more reliable than the EJ25.

    Go for the 2.2l all the way, when taken care of they last forever and are bullet proof. A friend of my brother is doing driver's Ed in a 2.2l with 220k miles, and think about it, DRIVER'S ED! Those cars are abused by novice 16 year olds that don't know how to drive!

    -juice
  • aarbeeaarbee Posts: 2
    ateixeira,

    thank for your reply. Any mpg numbers from current owners of 2.2l Imprezas?

    Thanks.
    Ritwik
  • Is the 2.5 unreliable? I am looking to buy a brand new 2.5i wagon this weekend and would appreciate any feedback from the Subaru Crew.

    Thanks
  • ateixeiraateixeira Posts: 72,587
    Those has issues with the head gaskets.

    Of course if they haven't failed in 8 years they probably never will. Check for oil stains on the bottom of the block.

    -juice
  • kyfdxkyfdx Posts: 29,199
    5 tanks so far...

    26.1 mpg -- low
    28.2 mpg -- high

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  • kyfdxkyfdx Posts: 29,199
    29.5 mpg..

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  • tinycadontinycadon Posts: 287
    What was your speed and distance?
  • kyfdxkyfdx Posts: 29,199
    Suburban commuting....

    21 miles each way to work.... 30 minute drive... 17-18 miles of suburban/urban freeway and the rest is 25 mph roads.. Plus weekend errand running...

    402 miles on that tankful...

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  • kyfdxkyfdx Posts: 29,199
    Gee.. this discussion has become my own personal blog.. :)

    Last tank was 31 mpg.. Almost all commuting.. I attribute the increase to my wife being on crutches.. Easier for her to get in and out of her SUV, so less errand running for the Impreza.

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  • nippononlynippononly SF Bay AreaPosts: 12,692
    was 13.7 gallons, 390 miles, looks like 28.5 mpg on my calculator. Better than expected, and I am hoping as I get more used to it I can improve that.

    The fuel light was already on, so I guess that is a very healthy remainder when the warning light hits, something like 2.5 gallons.

    Mine is a 2009 OBS 5-speed.

    2013 Civic SI, 2009 Outback Sport 5-spd (stick)

  • xwesxxwesx Fairbanks, AlaskaPosts: 8,508
    The fuel lights on my Outbacks were very consistent. They came on with ~13.5 gallons used. Unless there was a need to fill prior to seeing the light, I did not do it. Both my Caravan and Escort are not nearly so reliable; I tend to fill them up at a quarter tank just because I am never sure how much fuel actually remains.

    28.5 is great for a first tank! I think that is actually about the same as our first tank on our '08 Outback. But, most of that tank was my wife driving I-5 from Seattle to Salem at 65 mph. So, it was steady, mostly flat highway miles, and very little weight in the car. The trip computer read 33 mpg when we arrived in Salem, but, after loading the car and putting on another 50 or so miles, we were down to 29ish on the computer by fill-up.
  • nippononlynippononly SF Bay AreaPosts: 12,692
    I like that the gauge also seems very reliable. It doesn't stay on full for the first 100 miles, then drop like a rock down to the last quarter tank, than have 3 gallons left below the 'E' line, as my Toyotas do.

    Half a tank remaining really is half a tank, 1/8 (when the fuel light comes on) really is 1/8, etc.

    2013 Civic SI, 2009 Outback Sport 5-spd (stick)

  • ateixeiraateixeira Posts: 72,587
    The low-fuel warning used to come on with 2.3 gallons left, per Subaru, on my 1998 with the 15.9 gallon tank.

    I wouldn't assume it's 3 gallons, though.

    Both now have 16.9 gallon tanks. Funny thing is all Subaru's have the same fuel capacity, from the Impreze 2.5i all the way up to the Tribeca 3.6 H6!
  • nippononlynippononly SF Bay AreaPosts: 12,692
    Are you sure? The owner's manual says 15.9 gallons for my car.

    Which would jibe with the fuel light coming on at 13.3 gallons consumed, as it has been.

    Oh, and the "3 gallon" reference was to my old Toyota, not to the new car. :-)

    2013 Civic SI, 2009 Outback Sport 5-spd (stick)

  • ateixeiraateixeira Posts: 72,587
    The Forester's tank grew, to be honest I'm not sure about the Impreza. Anyone know for sure? It might be in the owner's manual under capacities.
  • nippononlynippononly SF Bay AreaPosts: 12,692
    My tank is 15.9 gallons, checked the manual again.

    And I refilled it last night, 14.0 gallons, 385 miles, for a lower average than last time, 27.5 mpg.

    The trip computer on the dash is about 1 mpg too optimistic.

    I will be working on getting my averages to 30.....

    2013 Civic SI, 2009 Outback Sport 5-spd (stick)

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