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Old 12-24-2008, 04:21 PM   #1
Old_Lady_Driver
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Default Gas mileage on 2008 2.5i AT

I have a 2008 Impreza 2.5i 5-dr wagon, automatic transmission, with about 5000 miles. What should I be expecting for mileage on city driving? I am down to about 17.5 mpg which seems ridiculously low -- the EPA estimate was 20 mpg city. We have had very cold weather lately, and snow, and I know cold weather hurts gas mileage but.... The city MPG has been steadily dropping since I bought the car in August. I started out about 23 mpg in the city, which was great.

I had a 96 Legacy wagon auto trans, with the 2.2 liter engine, and I routinely got about 22-23 mpg in city driving - same city, same climate.

What would cause a new car to get this kind of low city MPG, what should I expect, and discuss with the local Subaru service dept? Thanks.
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Old 12-24-2008, 05:40 PM   #2
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I have a 2008 OBS 2.5i, but it is a 5 speed. I get roughly 23 mpg in the cold and snow pack.
17.5 mpg does seem a little low, but it all depends on the weather and the way you drive.
Have you tried highway driving and seeing what you get?
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Old 12-24-2008, 05:53 PM   #3
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Last long trip I took (at Thanksgiving), I got roughly 28-29 mpg on straight interstate driving, but temps weren't too cold. I'm a fairly conservative driver, don't do hard acceleration, and treat the car pretty gently. I know auto trans is worse than manual for mileage -- but am very disappointed this new car can't match my old 2.2L Legacy wagon for city mileage. They weigh about the same. Does the 2.5L engine, and increased horsepower, make for worse mileage than a 2.2L engine?
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Old 12-24-2008, 06:45 PM   #4
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I average 23 mixed driving when I'm conservative.
In the city, I was averaging 17-19 mpg.
My mileage got better after 5k and again at 10k.
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Old 12-25-2008, 02:50 PM   #5
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Holy crap guys...

I get about 26 city, 28-32 highway depending on the terrain and if i have crap on the roof.


I haven't been checking my mileage in the cold, though.
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Old 12-25-2008, 09:42 PM   #6
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Quote:
Originally Posted by Old_Lady_Driver View Post
Last long trip I took (at Thanksgiving), I got roughly 28-29 mpg on straight interstate driving, but temps weren't too cold. I'm a fairly conservative driver, don't do hard acceleration, and treat the car pretty gently. I know auto trans is worse than manual for mileage -- but am very disappointed this new car can't match my old 2.2L Legacy wagon for city mileage. They weigh about the same. Does the 2.5L engine, and increased horsepower, make for worse mileage than a 2.2L engine?
2008 m/t and a/t rated the same mpg.
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Old 12-26-2008, 10:37 AM   #7
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i have an 07 2.5i and when i fill up i get about 300 miles till the tank gets extremely close to yellow
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Old 12-26-2008, 12:11 PM   #8
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Quote:
Originally Posted by Old_Lady_Driver View Post
I have a 2008 Impreza 2.5i 5-dr wagon, automatic transmission, with about 5000 miles. What should I be expecting for mileage on city driving? I am down to about 17.5 mpg which seems ridiculously low -- the EPA estimate was 20 mpg city. We have had very cold weather lately, and snow, and I know cold weather hurts gas mileage but.... The city MPG has been steadily dropping since I bought the car in August. I started out about 23 mpg in the city, which was great.

I had a 96 Legacy wagon auto trans, with the 2.2 liter engine, and I routinely got about 22-23 mpg in city driving - same city, same climate.

What would cause a new car to get this kind of low city MPG, what should I expect, and discuss with the local Subaru service dept? Thanks.
Your drivetrain is not broken in yet. I have the feeling the Subaru service guys may tell you the same thing. You can expect your mileage to slowly climb over the next few thousand miles. Most cars have completely broken in by 10K miles, but some take longer.

That aside, if you are taking it in it doesn't hurt to have them check for moving parts that could be binding (brakes, etc.) and ruining your mileage.
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Old 12-27-2008, 12:18 AM   #9
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I've been high 19s and I thought I was bad
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Old 12-27-2008, 12:31 AM   #10
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OP, check your tire pressure. All other maintenance stuff should be up to date if it's a 2008.
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Old 12-27-2008, 02:09 AM   #11
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Huh, I used to get about 28MPG city, 38MPG highway on my 2005 RS. However, for whatever reason, about a year ago, I started getting 21-24MPG no matter where or how I was driving.
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Old 12-27-2008, 11:43 AM   #12
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Quote:
Originally Posted by williaty View Post
Huh, I used to get about 28MPG city, 38MPG highway on my 2005 RS. However, for whatever reason, about a year ago, I started getting 21-24MPG no matter where or how I was driving.
How the fk do u get 38mpg let alone over 25 mpg
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Old 12-27-2008, 01:29 PM   #13
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Quote:
Originally Posted by Un0RiGiNaL View Post
How the fk do u get 38mpg let alone over 25 mpg

Don't drive like a total artard, and you will get 26mpg pretty much anywhere. I've hit 33 on the highway, and i think more is certainly possible but i'm not that patient.

Or, put another way, how the fk do you get less than 26mpg? Just keep your right foot on the floor all the time?
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Old 12-27-2008, 02:20 PM   #14
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I only get ~20mpg because of my commute having quite a bit of stop and go driving...

Are you sitting around a lot at stoplights, or idling the car a lot in the morning to warm it up?
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Old 12-27-2008, 02:30 PM   #15
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Originally Posted by sniper1rfa View Post
Don't drive like a total artard, and you will get 26mpg pretty much anywhere. I've hit 33 on the highway, and i think more is certainly possible but i'm not that patient.

Or, put another way, how the fk do you get less than 26mpg? Just keep your right foot on the floor all the time?
I RARELY go over 3.5k rpms let alone 3k rpms.
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Old 12-28-2008, 08:53 AM   #16
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According to the display on the dash I have averaged 24.3 for the 13k I have had my 2008 2.5i. I reset the trip a when I fill up and have seen as high as 36 mpg part way through the tank when I drive mostly highway. Most of the time I range from 22 mpg to 25 mpg as an average for a full tank. I have noticed that I am now usually near the 22mpg -23 mpg range with the cooler temps lately. 17 mpg seems extremely low unless you keep a brick on your accelerator the entire time you are driving, or idle your car for 15-20 minutes each time you start it.

Definitely check the normal stuff. Oil, coolant, tire pressure. If that doesn't work I don't know what else to tell you other than get it looked at by a mechanic.

Good luck with your issue,
Hal
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Old 12-28-2008, 09:43 AM   #17
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Quote:
Originally Posted by Un0RiGiNaL View Post
I RARELY go over 3.5k rpms let alone 3k rpms.

I dunno man - i use to get 26-28 in my brother's '02 also, and that motor was beat to hell.

I have a feeling you're not calculating it correctly, and that you're actually getting much better mileage than you think. I guess that because when you hit the low fuel light you still have another 100-150 miles left. 300-350 miles when the light comes on is right on for hitting 450 miles per (real) tank, or ~30mpg. I've done that before - got home with less than a gallon in the tank after 8 hours and 450 miles.
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Old 12-28-2008, 02:36 PM   #18
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08 2.5i manual, 19k miles
17-25 in the winter.
21-29 in the summer.
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Old 12-28-2008, 10:14 PM   #19
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Originally Posted by sniper1rfa View Post
I dunno man - i use to get 26-28 in my brother's '02 also, and that motor was beat to hell.

I have a feeling you're not calculating it correctly, and that you're actually getting much better mileage than you think. I guess that because when you hit the low fuel light you still have another 100-150 miles left. 300-350 miles when the light comes on is right on for hitting 450 miles per (real) tank, or ~30mpg. I've done that before - got home with less than a gallon in the tank after 8 hours and 450 miles.
no you get 2 gallons when the light turns on. cause when i fill up when the lights on i fill about 12.5 gallons or 13 or something and the car has 15.9 gallons
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Old 12-28-2008, 10:31 PM   #20
sniper1rfa
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Yeah, thinking about it, perhaps i was being slightly optimistic about that. Probably more like 60-90 miles. I usually don't run mine down that far.
]
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Old 12-28-2008, 10:41 PM   #21
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Where the orange light turns on varies WILDLY from car-to-car. In mine, it turns on at about 4 gallons remaining, on my fiancee's, it's pretty much bang on 5 gallons. One of my friends only has a gallon left when it turns on.
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Old 12-28-2008, 11:36 PM   #22
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mine doesnt seem to always go on at the same point...cheapbaru.
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Old 12-29-2008, 08:02 AM   #23
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I've been getting between 30-34 on the highway in my 93. Depending on weather, wind, rightfoot, etc.....
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Old 12-29-2008, 10:36 AM   #24
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Quote:
Originally Posted by williaty View Post
Where the orange light turns on varies WILDLY from car-to-car.
You don't know nothin' til you've owned an SVX - my light comes on when the tank is down about 12.5 gallons... and it's an 18 gallon tank! (SVXi have this in common, although not necessarily to the same severity.)

The first question that should be asked in any fuel economy thread is: Are you checking it right? This should be followed by: How did the tankful before and after it do?

We've had too many people reading their gas gauge to define how much fuel they had, and gas pump auto shutoff can vary quite a bit. If your car is constantly getting 17s in typical city traffic, then that mark is defined. A tank here or there? Not so much.

I'm having trouble buying the 38mpg claim, as well. Unless it was a 55mph constant trip, that's a lot of work to attain.
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Old 12-29-2008, 02:34 PM   #25
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The 38mpg trip was 70mph on the freeway, staying behind semis when I could, level ground, no stops, with a tail wind, just me and a passenger in the car, no luggage or load. We were freaking out about it too! We passed the mileage I "knew" meant empty tank while the display was still reading about 1/3rd of a tank. We kept cruising. We were both SURE we were going to run out of gas but it was too unbelievable to stop, we wanted to figure out how far we could push it!. Sadly, just past 500mi, the trip was over and I refilled the tank to leave the car overnight.
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