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Old 07-19-2012, 10:03 PM   #1526
flyboy1100
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Originally Posted by chicagocpo View Post

My dealer was all about touting the great gas mileage of the Impreza, assuring me I'd probably see BETTER than the 36 mpg est highway, and even showed me a cell phone picture of a 40.2 avg mpg supposedly after a trip from Boston to Springfield, MA (uphill on the mass pike). Now at least I believe it can be done. Like others have said here, anyone can hit 40-50 mpg coasting down a hill. What matters is your average over time, and with my last three fillups yielding 34.4, 37.3 and 35.3 mpg, I have nothing to complain about.

i think everyone wanted to see this right off the start and at speeds higher than used for epa estimates. I see 10% ish below epa estimates, but I drive 10 over what they used for those numbers. I have no complaints, I get better gas mileage than my old car and it is more fun to drive.
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Old 07-22-2012, 01:22 PM   #1527
bcsooby
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Default MPG - Sport Limited

3,000 miles on my Sport Limited. I've tracked "trip A" and "trip B". Trip A was reset at every fill up for manual computation. Trip B has been ongoing since I bought the car, so only computer info. Have not done my first oil change yet, and hoping to see a little higher averages after oil change. Here are my averages.

Trip A
Average MPG from computer: 28.9
Average MPG from manual calculation: 27.3

Trip B
Average MPH: 32
Average MPG from computer: 28.5


I've been driving a real mix of conditions. A lot of hills around the Seattle metro area. One tank was mostly city, a few tanks were mostly highway. A 440 mile trip from Seattle to Whistler and back with two bikes on top of car, two people, luggage, and another bike inside car.
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Old 07-23-2012, 09:49 AM   #1528
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I drove 200 miles on the Interstate yesterday, first time I've cruised at sustained speeds of over 70mph. My car gets MUCH better mileage around town. At 80, I was only seeing high twenties on the display.
I think the CVT is definitely the way to go for interstate driving. I still prefer my 5 speed, but mpg's over 55mph are pretty dismal.
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Old 07-23-2012, 10:17 AM   #1529
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I guess this doesn't surprise me. 80 MPH is fast, and drag increases exponentially with speed.

If you're patient and are willing to lock your cruise control at less than 70 MPH in a 65 MPH zone, you'll get fuel economy numbers well into the 30s, even if you have the manual tranny (which I do, and my car is barely broken in at 1700 miles on the odometer, so I expect it to do even better in a few thousand miles).

I locked my cruise control at 68 on one road trip, and hand calculated 34.5 MPGs. And I had two adult passengers and luggage for three loaded into the car, too.
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Old 07-23-2012, 10:33 AM   #1530
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I recently drove several hundred miles non stop with speeds averaged 65 mph CVT MPG in high thirties consistently. I have noticed on trips with average speeds over 70 mph my mpg was in low 30's. This is running A/C with 3 total passengers and small amount of cargo. In addition, when I took trips where speeds were between 55-60 mph I averaged 41-42 mpg. Seems to me the sweet spot for mpg is under 60 mph.
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Old 07-23-2012, 11:11 AM   #1531
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Originally Posted by sgoldste01 View Post
I guess this doesn't surprise me. 80 MPH is fast, and drag increases exponentially with speed.

If you're patient and are willing to lock your cruise control at less than 70 MPH in a 65 MPH zone, you'll get fuel economy numbers well into the 30s, even if you have the manual tranny (which I do, and my car is barely broken in at 1700 miles on the odometer, so I expect it to do even better in a few thousand miles).

I locked my cruise control at 68 on one road trip, and hand calculated 34.5 MPGs. And I had two adult passengers and luggage for three loaded into the car, too.
i was pulling 34mpg yesterday at 78mph with a 10mph tailwind

this tank is shaping up like my last one, should be 30-31mpg for mixed conditions
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Old 07-23-2012, 12:38 PM   #1532
p.allen.mariottini
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Default 2012 Impreza 2.0i Sport Limited - First Gas Tank - MPG

27.5 mpg average on first tank fill. 20% HWY,80% City. Hoping better MPG after I get the hang of the CVT transmission/Manual mode.
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Old 07-23-2012, 12:48 PM   #1533
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Quote:
Originally Posted by Impreza1228 View Post
I recently drove several hundred miles non stop with speeds averaged 65 mph CVT MPG in high thirties consistently. I have noticed on trips with average speeds over 70 mph my mpg was in low 30's. This is running A/C with 3 total passengers and small amount of cargo. In addition, when I took trips where speeds were between 55-60 mph I averaged 41-42 mpg. Seems to me the sweet spot for mpg is under 60 mph.
this is very consistent with my own experiences.
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Old 07-23-2012, 01:52 PM   #1534
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My dash indicated better mpg's at 80 than at 70. 80 is pretty fast but not on I95. We were going around 80, and an old beat up Legacy wagon with two old ladies blew by us going at least 90. I stayed between 70-80 because there were a lot of troopers out.
The car does ride and handle well at high speeds.
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Old 07-23-2012, 02:03 PM   #1535
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Quote:
Originally Posted by 79letour View Post
My dash indicated better mpg's at 80 than at 70.
It is my belief that, on average, this is not possible. Perhaps if there's a tail wind, or perhaps if you're going down hill at 80 mph vs on flat ground at 70 mph, then this is possible. But averaged out over a long trip, I would fall out of my chair if the car got more MPGs at 80 mph vs 70 mph. Simple physics. The car needs to work harder pushing the air at 80 mph than at 70 mph. That harder work must consume more fuel.
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Old 07-23-2012, 02:28 PM   #1536
79letour
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I'm just stating what I observed while driving over 200 miles. At 80 with the cruise on, hills don't sap as much power and mpg's away. At 70, even a gentle hill greatly reduces mpg's. Also-with computer controlled everything, it wouldn't surprise me if the car used less fuel at certain speeds even if they're higher. I tend to do a little better at 60mph than 55. Ymmv.
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Old 07-23-2012, 02:51 PM   #1537
sgoldste01
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Quote:
Originally Posted by 79letour View Post
Also-with computer controlled everything, it wouldn't surprise me if the car used less fuel at certain speeds even if they're higher. I tend to do a little better at 60mph than 55. Ymmv.
If this was true, it would more than surprise me. I would be astounded.

Has anyone else duplicated what 79 describes?
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Old 07-23-2012, 03:36 PM   #1538
Zeeper
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Originally Posted by sgoldste01 View Post
If this was true, it would more than surprise me. I would be astounded.

Has anyone else duplicated what 79 describes?
It's probably due to all that expensive oil entering the combustion chamber at higher speeds.

I pulled 36mpg avg over 10 miles at 67mph, but I would have had slightly higher mpg's at 60mph, and lower mpg's at 80. That's my car though, it's still subject to newtonian physics.
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Old 07-23-2012, 04:13 PM   #1539
flyboy1100
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Originally Posted by Zeeper View Post
It's probably due to all that expensive oil entering the combustion chamber at higher speeds.

I pulled 36mpg avg over 10 miles at 67mph, but I would have had slightly higher mpg's at 60mph, and lower mpg's at 80. That's my car though, it's still subject to newtonian physics.

since you have asked me twice about my usage of 5th gear, I have a question for you.

at 45 mph (or whenever you engage 5th) what is your mpg? I have done some testing on mine, and just like i thought I would see, I see better mpg @45 in 4th than 5th gear. 4th = high 40's, 5th = low 40's
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Old 07-23-2012, 04:38 PM   #1540
Zeeper
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I shift into 5th gear when I am going faster than 40mph or so and will be doing so for more than a city block. I shift based on engine sound, or feel, but honestly I just do it subconsciously at this point.

I don't stare at the computer gauge, and I don't really pay attention to the dash gauge (which just appears to be a vacuum meter and is pretty pointless -- too bad it isn't a temperature gauge...).

All I am really concerned with is my overal MPG's, which for my car in mixed 'country' driving hang out about 29mpg. I've seen above 36mpg on the highway, and don't drive in the city so I've never seen less than 26mpg on a tank of gas.

I don't need gauges that tell me when I put my foot on the gas MPG's go down, or that turning lower rpm's on an engine (without lugging it) will produce better MPG's (as will gradual acceration and not accelerating when you will obviously be stopping at an upcoming traffic light).

At this point I shut off the overall mpg gauge, my mileage is pretty consistent. It's on fuelly if you want to look at the stats.
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Old 07-23-2012, 04:50 PM   #1541
winglik
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posted by mistake, please remove

Last edited by winglik; 07-23-2012 at 04:51 PM. Reason: posted by mistake, please remove
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Old 07-23-2012, 04:53 PM   #1542
sgoldste01
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Zeeper, I believe you don't fully appreciate the usefulness of the ECO meter (which you refer to as the dash gauge/vacuum meter). At first I felt as you do, until I understood what it's telling me better.

The center line on the ECO meter represents your average MPGs. So the meter changes its calibration dynamically; as you work to improve your average MPGs, the value represented by the center line increases. This becomes like a game, then; as your average MPGs increases, it becomes increasingly challenging to keep the needle above the center line.

This is both useful and entertaining. Give it a try!
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Old 07-23-2012, 04:53 PM   #1543
79letour
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Quote:
Originally Posted by Zeeper View Post
It's probably due to all that expensive oil entering the combustion chamber at higher speeds.

I pulled 36mpg avg over 10 miles at 67mph, but I would have had slightly higher mpg's at 60mph, and lower mpg's at 80. That's my car though, it's still subject to newtonian physics.
You just can't help yourself can you. Once again- my hat is off to you for your witty, smartassed post.
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Old 07-23-2012, 06:58 PM   #1544
SlicksubieSD
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i have the manual spd and i consistently been seeing an increase in my mpg ... barely 2000 miles and the second +road trip ive gone on i noticed i went from about 27 mpg the first time and this time was 32 mpg basically same style of driving and traffic i actually drove faster this time too.

just wondering when you guys fill up how much miles till empty does your impreza say it has mines usually around 340 or less
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Old 07-23-2012, 09:56 PM   #1545
flyboy1100
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Quote:
Originally Posted by SlicksubieSD
i have the manual spd and i consistently been seeing an increase in my mpg ... barely 2000 miles and the second +road trip ive gone on i noticed i went from about 27 mpg the first time and this time was 32 mpg basically same style of driving and traffic i actually drove faster this time too.

just wondering when you guys fill up how much miles till empty does your impreza say it has mines usually around 340 or less
i usually fill up around 300 miles
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Old 07-24-2012, 12:40 AM   #1546
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Quote:
Originally Posted by Zeeper View Post
I don't stare at the computer gauge, and I don't really pay attention to the dash gauge (which just appears to be a vacuum meter and is pretty pointless -- too bad it isn't a temperature gauge...).
The "vaccum gauge" centerline is always your rolling average mpg. Keep the needle on the plus side, your average is going up. Useful for developing a light touch on the gas, it has trained me to get the most mileage out of the car when I want to.
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Old 07-24-2012, 06:22 AM   #1547
Zeeper
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I pretty much drive the same way I always have. I am not a hyper miler, though I am pretty easy on the car.

I know if I start hammering it my MPG's will go down, and I know if I drive the way I usually drive where I usually drive I will be right around 29mpg in this car. This is about 3mpg less than a 2008 Elantra yielded. I like the subaru better so no regrets.

The gauge may be useful for you. I look at it occasionally, it is only slightly entertaining and it does not affect my driving behavior at all.
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Old 07-24-2012, 07:40 AM   #1548
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Fair enough. I just wanted to make sure you understood that it's not as simplistic as a vacuum gauge. The ECU is controlling the behavior of the ECO meter, based partially on your average MPGs.
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Old 07-24-2012, 03:19 PM   #1549
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I utilize a scangauge II device. To monitor trip MPG avg., GPH (gallons per hour), Instant MPG, MPH. there are several other settings I can switch to as well. Like Coolant temp. RPM and others. And if ever I get the CEL It will give the codes and let me reset them. That little eco needle is pretty useless for me, but is kinda fun to try keeping it to the right.


Great tool for about $180.

I had it on my last car and just plugged right in on this one.

My last fill got me 27.9 MPG. This time I did have about 10% real highway miles. However the city part was mostly my typical severe city. My overall average is still ticking up slightly. I'm happy with it.

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Old 07-24-2012, 09:01 PM   #1550
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Quote:
Originally Posted by ZionZR2 View Post
I utilize a scangauge II device. To monitor trip MPG avg., GPH (gallons per hour), Instant MPG, MPH. there are several other settings I can switch to as well. Like Coolant temp. RPM and others. And if ever I get the CEL It will give the codes and let me reset them. That little eco needle is pretty useless for me, but is kinda fun to try keeping it to the right.


Great tool for about $180.

I had it on my last car and just plugged right in on this one.

My last fill got me 27.9 MPG. This time I did have about 10% real highway miles. However the city part was mostly my typical severe city. My overall average is still ticking up slightly. I'm happy with it.

Does it calculate the MPG's better than the OEM trip computer?
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