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Subaru Impreza Real World MPG Numbers

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  • dfong87dfong87 Posts: 171
    so...took delivery on my limited hatchback yesterday and even with only 30 miles (37 overall) on it, i think i can contribute something here.

    so, i'm assuming that the dealer tested things out so that when i started driving the car, it was warme d up. i drove from the dealer to work and then home. i would say that the first trip was about 50/50 highway and then stop and go city stuff, the second trip was 60/40 highway/city driving. i got an average of 32.5 mpg over those two trips. very impressed especially since i could see, as expected, the stop and go stuff killing my mileage and i still got that number.

    this morning, pulling out of my garage in a mild, cold morning temp of 49 oF outside, i drove to the train station which is 4.1 miles away. in that short stretch, my mileage dropped (overall) to 30.6 mpg with mainly stop and go driving the whole way

    as has been suggested, the problem, is probably the 2-3 miles where the car is cold and trying to reduce emissions. i dropped to that 30 range average quickly and the last mile, it stayed steady there. so, although i didn't look at the instantaneous mileage, it suggests that when cold, i was probably seeing less than 20 mpg. (if my math is right, it got 22 mpg for my commute in -- all of these based on car's computer, not real consumption) i'll have to keep an eye on it in the days ahead, but i don't think i'll break my habit of driving away from my garage with the cold engine. letting it idle in my garage to bring it up to operating temp seems silly...
  • jd_24jd_24 Posts: 92
    Agree.
    I'm upto 200+ miles on my CVT Sport. I have a roughly 35 mile commute to work with 80% or so being urban interstate (highway) miles. Today there was 5 minutes of stop-n-go. So traffic conditions can really change the conditions from day to day.

    Within the first mile on city streets the blue temp light goes off. Then once on the interstate the first roughly 3 miles has the instant MPG usually under 25mpg. For the first 200 miles I'm still above 1/2 a tank and I don't think the tank was 100% full from the dealer. Average MPG based on the computer is 33, which includes 5 to 10 minutes of pure idle time at the dealer.

    Outside temps have been between 35 and 60. So not very cold, but not real warm either.

    My old 2001 Outback wagon is the same way. Cold engine = poor mileage. Once the engine is warm mpg is at or above the expected values.
  • fredjohnsonfredjohnson Posts: 48
    edited April 2012
    Did a trip last week for work. About 200 miles from Minneapolis to a small town where my customer's office is located. Majority of the trip at about 55-65 mph. I averaged 38 mpg. I swear the gasoline must be reformulated to summer now because I couldn't get any higher than 33 mpg in the winter on a nearly identical trip. Sunny day, no wind, temp of about 50 degrees.
  • danstheman7danstheman7 Posts: 1
    edited April 2012
    Car: 2012 Impreza Hatchback

    As a teenage driver, I can say that my average (combined) MPG is around 23, because i'm decently aggressive on the gas.

    Now, I do drive a lot of highway miles, where the real time highway MPG is usually around 30, but in the city the real time shows around...say...19.

    Still much better than my previous '07 Sportage, which averaged 12MPG.
  • ateixeiraateixeira Posts: 72,587
    Twelve?! Yikes.

    Let's see, carry the one, you're saving about a billion a year in gas now. LOL
  • xwesxxwesx Fairbanks, AlaskaPosts: 8,460
    You have to pay to play! :P
  • ateixeiraateixeira Posts: 72,587
    With today's gas prices, you pay even if you're not playing. ;)
  • jd_24jd_24 Posts: 92
    First fillup car showed 33.3mpg. I'm not sure the tank was full and the car idled much more than normal as salesman showed my the car and what not.

    237.3 miles 7.3 gallons 32.5mpg 33.6 car display
    374.2 miles 11.43 gallon 32.7mpg 35.4 car display
    319.2 miles 9.73 gallons 32.8mpg 34.8 car display - tempature ranged from 40 to 60?
    366.9 miles 11.48 gallons 31.96mpg 33.9 car display - tempature ranged from 30 to 55.
    364.0 miles 10.54 gallons 34.5mpg 36.9 car display - tempature ranged from 40s to 70.

    Current tank: Car display is 38.1 with about 140 miles. - temp ranging from 50 to 80.

    The tank that shows 31.9 mpg was a cold week and had more true city street driving. My current tank is more highway (70%?) and temperature is warmer. So far I'm happy but a little worried what -10F might bring next winter. Each fill was about a weeks worth of driving so none of these are a single long trip.
  • ateixeiraateixeira Posts: 72,587
    edited May 2012
    Impressive - makes you wonder who needs a hybrid?
  • rshollandrsholland Posts: 19,663
    I don't know about you, but an "optimistic" mpg display irks me to no no end. My WRX is off about the same.

    I think it may be due to the fact that the readouts are in 3/10 of a mile increments, rather than 1/10 of a mile increments, and therefore the accuracy is compromised.

    Bob
  • jd_24jd_24 Posts: 92
    The 3/10 probably pays a roll too. I took my numbers and just subtracted .5 gallons and then the car display matched. Hence my theory that the car doesn't know about some gas.
    I have noticed this Impreza does take a little more gas when topping-off than my old outback does. Agree it would be much nicer to have an accurate readout so I can put my calculator away.
  • jd_24jd_24 Posts: 92
    Funny you say "who needs a hybrid". The final choices in picking the new car was between the Prius and Impreza. Key difference is fun to drive with AWD or MPG. I figured a Prius would save me about $600 a year in gas money ($4 per gallon) and roughly a 5 year payback which isn't too bad.

    There is a need. But until gas goes $5, or you drive over maybe 20K miles a year, its not as much as one would think.

    For $600 not getting stuck at the bottom of my driveway sounds good. Oh and my wife hated driving the Prius, not that she gets to drive the Impreza much. :blush:
  • ateixeiraateixeira Posts: 72,587
    Of course if it snows and you have to rent a 4x4...

    ;)

    Or even to tow.

    The Soob is all around a more versatile, complete car.
  • jd_24jd_24 Posts: 92
    You mean when it snows. I'm in MN.
    Our driveway has 2 Subies and a Tahoe (4x4). The Tahoe sits mostly now.
    100% agree: "The Soob is all around a more versatile, complete car."
  • nippononlynippononly SF Bay AreaPosts: 12,690
    if I would rather have the slower FA20 (FB20?) you all have with the significantly better gas mileage you also have, or my '09 with the 2.5, which has what I would consider to be the minimum necessary power for a highway-going AWD car this size, but totally mediocre mileage as a consequence...

    Went camping this weekend, mostly highway with a little bit of being stuck in traffic and puttering around near the campground, 395 miles, 12.9 gallons, 30.5 mpg and that's pretty much the best I ever manage. :-(

    Oh, and I'm with Bob, it's annoying that the trip computer can't accurately calculate mileage, and I don't top off when filling up, but mine is a little closer than some here have reported. My readout this time was 31.5 mpg, so only one point off (it's usually more like 2).

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

  • ateixeiraateixeira Posts: 72,587
    The new one is lighter, plus the CVT can make the most of the power the 2.0l makes. I think acceleration is similar, maybe half a step behind yours.
  • charitcharit Posts: 1
    Is the Impreza easy to tow? Do I have to do anything to it to tow it behind a motor home?
  • xwesxxwesx Fairbanks, AlaskaPosts: 8,460
    If it has a manual transmission, it's easy to tow once you've mounted a triangle.

    Anything else, and it is also easy to tow.... all you have to do is put it on a trailer! ;)
  • galabargalabar Posts: 6
    I'm seeing an increase in mileage after several months of owning my new 2012 impreza. I was originally seeing 25 mpg at the pump (about 26.5 on the computer). Recently, I was doing a longish highway drive (about 20 miles). I kept the cruise control at 58-59 mph and the computer was claiming almost 42 mpg.

    I've also noticed my combined seems to be creeping up to the low 30s (computer).

    Could the impreza be sensitive to winter gas formulations?
  • rshollandrsholland Posts: 19,663
    No doubt. My WRX's gas mileage increases in the summer.

    Bob
  • jd_24jd_24 Posts: 92
    For the Subarus I think its more the warmer temps. They warm up quicker and allow the RPMs to drop. With temps below 40 I drive about 6 or 7 miles before the RPMs drop and the engine and transmission is fully warm. Now with very warm temps (70+) its around 4 miles. In the afternoon on the way home with temps 90+ the car gets fully warm in about 3 miles, but then when I turn on the AC the mpg drops a bit.

    I'm not just using the blue temp gauge as determining when the engine is warm. The blue light goes out in about a mile, but the RPM stay about 500 or so higher until the car is fully warm.

    For long trips (over 30 miles) I haven't seen much of any change in average mileage. (Comparing March and April to June.)
  • Car has 7000 miles on it now. Last weekend on a 300 mile trip at just under 60 mph on the highway I got 39.5 mpg average. Car read as high as 44 mpg at times. the 39.5 is actual hand calculated mileage and not the car's readout mpg. A/C on for about 25% of the time, otherwise windows down the other 75%. In town(Minneapolis) I get around 30.5 mpg and that is a combo of freeway at up to 80 mph and stop and go rush hour freeway traffic.
  • nippononlynippononly SF Bay AreaPosts: 12,690
    edited August 2012
    I am seeing most tanks at 29 mpg now, including the one last night: 341 miles, 11.7 gallons. This is mixed suburban driving, with little rush hour stop-and-go driving. Mine is an '09 5-speed.

    I am looking over in the 2012+ thread and folks there seem to be doing about 2 mpg better than me in their mixed driving, so I would probably be able to improve my mileage to about 35 if I were to trade for a '12. So that would be almost a 20% savings, give or take.

    For now I'm standing pat....I rather like the extra power of the 2.5 vs the new 2.0, and I'm a little disgruntled at Subaru for not giving the new model a 6-speed manual, so that it could match the CVT for fuel economy.

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

  • tinycadontinycadon Posts: 287
    Test drove the '12 Impreza today, I was expecting a weak engine and let me tell you, it's surprisingly quick and had decent passing power. I went with the idea I'd hate it & just needed to see for myself so I could cross it off my list, NOPE, it goes right up to the top now. Go test drive it first before you write it off for not having enough power, trust me, it's perfectly fine!
  • nippononlynippononly SF Bay AreaPosts: 12,690
    Well the other thing is everyone in the 2012+ thread right now is talking about how their new cars rattle like crazy on the inside. That has always been one thing I just can't stand.

    My current Subaru had the "standard equipment" A-pillar rattle when it was new. I had the dealer fix it, which they were able to effectively do, and it has not recurred (the car is at 40K miles now).

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

  • I have a 2012 Impreza Sport Premium with 3k miles on it. It has no rattles yet (knock on wood).

    The seat does creak when I get out of the car, but other than that, it's tight!
  • ateixeiraateixeira Posts: 72,587
    I felt the same way after a test drive.

    I liked it more than the Mazda CX5 and Mazda3 2.5l we drove back-to-back-to-back.

    Give the CVT a chance. I was pleasantly surprised.
  • How many miles did you have on your 2012 Impreza when the mileage started to get better. I'm pretty unhappy with mine about now as the owner's manual indicated MPG would begin to approach the advertised MPG around 3,000 miles. It's there and I've seen no improvement, so I talked with the service people about it. They plugged it in, said everything is working exactly as it should, and that I should start to see some improvement by the time it hits 18,000 miles. That's just unacceptable. Is this REALLY normal for a Subaru, as the dealership is telling me? And if it is, shouldn't this be stated somewhere in the advertising that touts the (supposedly) great gas mileage these cars are supposed to get?
  • The dealer should have told you to see how your MPGs are this upcoming summer. Here are some factors that might be working against you right now:
    • Winter gas doesn't store as much energy as summer gas because of the winter additives, so your car consumes more winter gas.

    • Your car runs less efficiently when the engine is cold, and it takes more time for the engine to warm up when it's cold outside. Many short trips exasperate this problem.

    • Both of the Defrost modes on your climate control knob make use of the air conditioning compressor (even though the A/C light doesn't turn on). If you commonly drive in the winter time in one of the Defrost modes, then that will wack a couple of MPGs off of your calculation. Try driving without using one of the Defrost modes whenever possible.

    • In many areas of the country, the supplied gas is E10 (10% ethanol). This causes approximately a 10% reduction in MPGs when compared to E0 gas. If you can find a gas station that sells E0, give it a try. You can bet that Subaru was running E0 when they did their EPA tests.
    Hope this helps.
  • (new to this forum)

    I researched on Consumer Reports and other sources before I bought my 2013 Impreza Sport Premium wagon in December so I knew that 26mpg was a more realistic number than the "ideal" 36mpg hway in the Subaru promotional literature.

    I drive 60mi round trip work/home daily which is about 70% slow traffic/30% highway (NYC and suburbs). I can't say I'm thrilled that I'm averaging only 24.5mpg but I am already saving an average of 5gals/wk over the Toyota Sienna minivan that this car replaced. That's $850 annually assuming an avg of $3.40/gal by 50 weeks.

    I also drove to Toronto and back two weeks ago and I averaged 27mpg on that mostly highway but very hilly route through upstate NY.

    Also, don't forget that this is an extremely fun car to drive which, when coupled with my $$$ savings, is a win-win in my book. I drove home in the driving snow from the blizzard called "Nemo" last Friday night and it ate up the slippery mess on the Palisades Pkwy with no problems.

    Ownership 6 weeks
    Total mileage 4125.3
    Total gallons fuel 179.87
    Total fuel cost $519.00
    Avg cost per gallon $3.408
    Avg mileage per gallon 24.584
    Avg # gallons per fill-up 12.63
    Avg # of days between fill-ups 3.77
    Avg # of miles between fill-ups 313.95
    # of fill-ups 16

    Looking forward to the warmer months if it is true that the summer blend gas will net me more mpg.

    Hope this is helpful to others.
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