Welcome to the North American Subaru Impreza Owners Club Wednesday September 2, 2015
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Here you can view your subscribed threads, work with private messages and edit your profile and preferences Home Registration is free! Visit the NASIOC Store NASIOC Rules Search Find other members Frequently Asked Questions Calendar Archive NASIOC Upgrade Garage Logout
Go Back   NASIOC > NASIOC Subaru Models > Impreza Forum

Welcome to NASIOC - The world's largest online community for Subaru enthusiasts!
Welcome to the NASIOC.com Subaru forum.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, free of charge, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!

If you have any problems with the registration process or your account login, please contact us.
* Registered users of the site do not see these ads.
Reply
 
Thread Tools Display Modes
Old 12-07-2012, 06:07 PM   #2576
sgoldste01
Scooby Specialist
 
Member#: 322264
Join Date: Jun 2012
Chapter/Region: Tri-State
Location: Webster, NY
Vehicle:
2012 Impreza Sp 5sp
Obs Blk Prl/Drk Gray Mtl

Default

Quote:
Originally Posted by ZionZR2 View Post
With this information and the way I fill I now know that a 600 mile tank is possible.
How do you fill?
* Registered users of the site do not see these ads.
sgoldste01 is offline   Reply With Quote
Sponsored Links
* Registered users of the site do not see these ads.
Old 12-07-2012, 06:44 PM   #2577
stevehnm
Scooby Specialist
 
Member#: 329526
Join Date: Aug 2012
Chapter/Region: SWIC
Location: Ground Control
Vehicle:
2013 Impreza Spt cvt
Silver

Default

Quote:
Originally Posted by flyboy1100 View Post
I especially think this part is appropriate for you and zeeper:

"In an insincere or pretending manner"

After all, you gave up facts a looong time ago, except for anecdotal ones.
stevehnm is offline   Reply With Quote
Old 12-07-2012, 10:18 PM   #2578
bpeterson272
Scooby Newbie
 
Member#: 316047
Join Date: Apr 2012
Location: Minnesota
Vehicle:
2012 Sport Premium
Sage Green / Ice Silver

Default

I seem to recall some asked about the effect of breaking in on fuel economy. If the breaking period is defined as 3500 miles, and I segregate the data by transmission type, then correct the data for % city, I get the following (this may not be readable in a post, but here goes):

One-way ANOVA: CVT Avg corr versus Miles group

S = 2.432
R-Sq = 5.83%
R-Sq(adj) = 4.77%

Individual 95% CIs For Mean Based on Pooled StDev

Level N Mean StDev
GT 3500 54 31.041 2.312
LE 3500 37 29.823 2.600

Pooled StDev = 2.432


One-way ANOVA: 5-MT Avg corr versus Miles group

Individual 95% CIs For Mean Based on Pooled StDev

S = 2.288
R-Sq = 0.00%
R-Sq(adj) = 0.00%

Level N Mean StDev
GT 3500 14 30.983 2.023
LE 3500 14 30.999 2.526

Pooled StDev = 2.288

The message in all that fancy stuff above is if you have a manual transmission there appears to be no break-in effect. If on the other hand you have a CVT transmission there is most certainly a break-in effect of about 1 mpg. I suppose one would conclude it is the transmission that is breaking in rather than the engine.

I think this is close to the limit of the data. Thanks for reading.

Last edited by bpeterson272; 12-07-2012 at 10:26 PM.
bpeterson272 is offline   Reply With Quote
Old 12-07-2012, 10:24 PM   #2579
stevehnm
Scooby Specialist
 
Member#: 329526
Join Date: Aug 2012
Chapter/Region: SWIC
Location: Ground Control
Vehicle:
2013 Impreza Spt cvt
Silver

Default

Quote:
Originally Posted by bpeterson272 View Post
The message in all that fancy stuff above is if you have a manual transmission there appears to be no break-in effect. If on the other hand you have a CVT transmission there is most certainly a break-in effect. I suppose one would conclude it is the transmission that is breaking in rather than the engine.

I think this is close to the limit of the data. Thanks for reading.
That makes sense. I've never had such a difference in mpg during break-in.

Thanks for the work!
stevehnm is offline   Reply With Quote
Old 12-07-2012, 11:51 PM   #2580
gravitylover
Scooby Newbie
 
Member#: 334328
Join Date: Oct 2012
Location: Mahopac NY
Vehicle:
2013 BRZ Premium 6MT
Mid Life Crisis White

Default

Quote:
Originally Posted by stevehnm View Post
Heck, I can get 50 mpg.

If I slow to 30 mph.

The trouble is I'm making less than $4 an hour for that extra time.

If you think it's worth it, that's up to you. I'd put my flashers on though.
My commute is 38 miles highway, 5 miles suburban between 25-50 mph and 12 miles on NYC surface streets. Sometimes at night or on Saturdays it's more like 4 miles of city streets and 46 highway plus the 5 closer to home which is very hilly with a bunch of traffic lights and stop signs. My average speed, for both of my cars in the last four years, has been 32-33 mph. My Volvo was at 105k when it got wrecked with a 32 avg and the Challenger had 24k and was at 33. I am far from a slowpoke on the highway, usually the guy in the left lane moving along about 15-20 over and spend a fair bit of time running up to VT or somewhere in New England to play on the weekends. I was quite surprised when I kept track of the avg speed, using the dash readouts, that it was that low considering how many miles I do on the open road.

So far with this car it's been right about 30 mph avg and my mpg's are exactly what they are supposed to be, 29.1. I wonder how good it can get after the tranny breaks in according to the info put forth in the last few posts.

Stop whining...
gravitylover is offline   Reply With Quote
Old 12-08-2012, 09:07 PM   #2581
ZionZR2
Scooby Newbie
 
Member#: 319990
Join Date: May 2012
Chapter/Region: TXIC
Location: Austin, TX
Vehicle:
2012 Imp Prm 5D CVT
Dark Grey Metallic

Default

Quote:
Originally Posted by sgoldste01 View Post
How do you fill?
I fill to the tippy top. I usually get 2.8 gallons in after the click off.
ZionZR2 is offline   Reply With Quote
Old 12-08-2012, 09:41 PM   #2582
ST Eye
Scooby Specialist
 
Member#: 73068
Join Date: Oct 2004
Location: MD
Vehicle:
2008 STI Boost Wagon
2014 Honda Accord Hybrid

Default

Quote:
Originally Posted by ZionZR2 View Post
I fill to the tippy top. I usually get 2.8 gallons in after the click off.
By doing so you are damaging the emissions system components.
ST Eye is offline   Reply With Quote
Old 12-08-2012, 10:21 PM   #2583
sgoldste01
Scooby Specialist
 
Member#: 322264
Join Date: Jun 2012
Chapter/Region: Tri-State
Location: Webster, NY
Vehicle:
2012 Impreza Sp 5sp
Obs Blk Prl/Drk Gray Mtl

Default

Quote:
Originally Posted by ST Eye View Post
By doing so you are damaging the emissions system components.
That's what I had always heard to, with regard to gas cars. Filling to the top of the filler neck was a common, acceptable practice with the TDI.
sgoldste01 is offline   Reply With Quote
Old 12-09-2012, 08:43 AM   #2584
gravitylover
Scooby Newbie
 
Member#: 334328
Join Date: Oct 2012
Location: Mahopac NY
Vehicle:
2013 BRZ Premium 6MT
Mid Life Crisis White

Default

Yeah from what I understand it damages the EVAP system when you do that.

There is one gas station (that I don't use often because of this) that is on a fairly good grade and the car is tilted when you fill it. With my Volvo I would fill up and as I pulled away the car would stall when it came off the hill. With my Challenger, because it had saddle tanks, it was great because I could actually fill up since the fuel was more likely to flow "over the hump" and fill both halves of the tank.
gravitylover is offline   Reply With Quote
Old 12-10-2012, 12:00 PM   #2585
ScoobieSnack09
Scooby Newbie
 
Member#: 291127
Join Date: Aug 2011
Chapter/Region: SCIC
Vehicle:
2013 Impreza 2.0i SP
5-dr DGM

Default

So I just noticed something recently that might help you guys. The freeway's I drive on sometimes are set at an incline, just enough to get the cvt to be in 5th gear and not shift to 6th. I have been moving to manual and setting it to 6th gear when I get on the freeway now and I have been getting 1+ mpg per the car's computer.

Just a thought. Also I agree with the start-ups. I warm my car up before I drive it and I can see the avg mpg drop like .6 every morning. give or take depending on cold it is and how long it takes to warm up (i warm until the rpms drop below 1k).
ScoobieSnack09 is offline   Reply With Quote
Old 12-10-2012, 12:47 PM   #2586
sgoldste01
Scooby Specialist
 
Member#: 322264
Join Date: Jun 2012
Chapter/Region: Tri-State
Location: Webster, NY
Vehicle:
2012 Impreza Sp 5sp
Obs Blk Prl/Drk Gray Mtl

Default

sgoldste01 is offline   Reply With Quote
Old 12-10-2012, 01:16 PM   #2587
myrt1987
Scooby Specialist
 
Member#: 323103
Join Date: Jun 2012
Chapter/Region: Tri-State
Location: toms river, nj
Vehicle:
2012 Limited 2.0i
Dreamy Gray Mistress

Default

Ehh... Im always a little hesitant to listen to tree hugger websites.
myrt1987 is offline   Reply With Quote
Old 12-10-2012, 02:07 PM   #2588
Zeeper
Scooby Specialist
 
Member#: 299286
Join Date: Oct 2011
Chapter/Region: NESIC
Location: Upstate NY
Vehicle:
2015 WRX CVT
White

Default

Quote:
Originally Posted by myrt1987 View Post
Ehh... Im always a little hesitant to listen to tree hugger websites.
If it makes you feel less tree huggy Click and Clack and every other mechanic I have ever seen (except the one out of a thousand that you are about to google) agrees that the best way to warm up a car is to drive it gently.

If you live in very, very cold climates (Minnesota, Alaska NOT North Carolina or Maryland) then warm it up enough to be able to drive safely, meaning you can see out your windows. I've had old cars that had a layer of ice on the inside of the window on a really cold day.

Otherwise just admit that the warming up part is more for you (so you can get in to a warmer car) than for the engine. The car is happier when it is driven instead of sitting there idling.
Zeeper is offline   Reply With Quote
Old 12-10-2012, 02:18 PM   #2589
myrt1987
Scooby Specialist
 
Member#: 323103
Join Date: Jun 2012
Chapter/Region: Tri-State
Location: toms river, nj
Vehicle:
2012 Limited 2.0i
Dreamy Gray Mistress

Default

I dont put the heat on while i drive. It takes away heat from the engine that it has to replace by burning more fuel. lol So i usually just wear a hat and gloves. I let my car warm up in idle mostly because i thought it was less wear and tear on the car than to turn it on and go and possibly save gas to have the car at warmer temps while operating.

And this topic is not important enough to me to go on a witch hunt for that one in a thousand site
myrt1987 is offline   Reply With Quote
Old 12-10-2012, 02:20 PM   #2590
Commander Keen
Scooby Specialist
 
Member#: 319157
Join Date: May 2012
Chapter/Region: MAIC
Vehicle:
2012 Impreza 4DR 5MT

Default

Quote:
I fill to the tippy top. I usually get 2.8 gallons in after the click off.
No matter how many warnings we have in our owner's manual and on our gas pumps, some people still think they know better.

Last edited by Commander Keen; 12-10-2012 at 04:18 PM.
Commander Keen is offline   Reply With Quote
Old 12-10-2012, 03:49 PM   #2591
saabarupp
Scooby Specialist
 
Member#: 189032
Join Date: Sep 2008
Chapter/Region: MAIC
Location: Pittsburgh
Vehicle:
2015 STI CWP
'12 Impreza Sport Ltd DGM

Default

I let the car warm up first so i can feel free to enjoy a little high revving fun before i get to work.
saabarupp is offline   Reply With Quote
Old 12-10-2012, 11:44 PM   #2592
thom52
Scooby Newbie
 
Member#: 309257
Join Date: Feb 2012
Chapter/Region: NWIC
Location: Kirkland WA
Vehicle:
2012 Imp 5D Prem CVT
Marine Blue

Question

Question...
Consensus seems to be that part of the significant consumption hit for the first couple of miles is warming up all the extra gearing for AWD.

How does sitting in the driveway with the engine running, help warm up the AWD gear oil? Seems like that would be an arguement in support of the "drive gently for warmup" theory for the shortest distance to a "warmed up" AWD car, and therefore much improved mpg.
thom52 is offline   Reply With Quote
Old 12-11-2012, 12:21 AM   #2593
ST Eye
Scooby Specialist
 
Member#: 73068
Join Date: Oct 2004
Location: MD
Vehicle:
2008 STI Boost Wagon
2014 Honda Accord Hybrid

Default

I don't think it is a matter of "warming up all the extra gearing". For the CVT, the lockup doesn't enable when the transmission temp is low. Not sure if that is what you mean?

Anyways, regarding cold cars and MPG loss, all the cars I have driven do this. The engine is not running at operating temperature. One factor I believe is open loop fueling perhaps.
ST Eye is offline   Reply With Quote
Old 12-11-2012, 12:33 AM   #2594
TYEFIM
Scooby Newbie
 
Member#: 323090
Join Date: Jun 2012
Chapter/Region: NWIC
Location: Seattle, WA
Vehicle:
2012 Impreza Sport
Obsidian Black Pearl

Default

I got 22.4 mpg going over a mtn pass. Did some snow testing. Larger snow tires. Roof rack with snowboards on top creating wind drag. I guess it's expected to get less the way I drove it but i still would hope for better. No matter. Best I done was 32.5 mpg avg mostly hwy. 14,000 miles on the odo now!
TYEFIM is offline   Reply With Quote
Old 12-11-2012, 02:48 AM   #2595
stevehnm
Scooby Specialist
 
Member#: 329526
Join Date: Aug 2012
Chapter/Region: SWIC
Location: Ground Control
Vehicle:
2013 Impreza Spt cvt
Silver

Default

Quote:
Originally Posted by TYEFIM View Post
I got 22.4 mpg going over a mtn pass. Did some snow testing. Larger snow tires. Roof rack with snowboards on top creating wind drag. I guess it's expected to get less the way I drove it but i still would hope for better. No matter. Best I done was 32.5 mpg avg mostly hwy. 14,000 miles on the odo now!
The best I've done for a tank is just under 31. Two trips of about 2000 miles have netted me 26.7 and 27.8 - with about 9,000 miles on it now. The second trip was "higher".
stevehnm is offline   Reply With Quote
Old 12-11-2012, 05:47 AM   #2596
Penguin44
Scooby Newbie
 
Member#: 315883
Join Date: Apr 2012
Chapter/Region: E. Canada
Vehicle:
2012 IMPREZA
Silver

Default

Quote:
Originally Posted by stevehnm View Post

The best I've done for a tank is just under 31. Two trips of about 2000 miles have netted me 26.7 and 27.8 - with about 9,000 miles on it now. The second trip was "higher".
Best I've done pure city is 27.75mpg covered from metric. My worst was my last tank. Short short short drives. Less then 2km total. Cold avg temp below freezing. Then finally a few longer drives at the end of the tank but got 22.2 mpg. My best highway was I think 42.265
Penguin44 is offline   Reply With Quote
Old 12-11-2012, 05:51 AM   #2597
Penguin44
Scooby Newbie
 
Member#: 315883
Join Date: Apr 2012
Chapter/Region: E. Canada
Vehicle:
2012 IMPREZA
Silver

Default

Yes just checked my trip logs. 42.265 or almost 5.6l/100km at a steady 105kph cruise on (65mph) no ac for almost 700km
Penguin44 is offline   Reply With Quote
Old 12-11-2012, 06:46 AM   #2598
flyboy1100
Scooby Specialist
 
Member#: 314216
Join Date: Mar 2012
Location: ND
Vehicle:
2012 2.0i Sport 5MT
DGM

Default

Quote:
Originally Posted by thom52 View Post
Question...
Consensus seems to be that part of the significant consumption hit for the first couple of miles is warming up all the extra gearing for AWD.

How does sitting in the driveway with the engine running, help warm up the AWD gear oil? Seems like that would be an arguement in support of the "drive gently for warmup" theory for the shortest distance to a "warmed up" AWD car, and therefore much improved mpg.
When it is -10f (yesterday for example) I'm going to let the engine warm a little bit before I drive, then drive easy until it is warm. I have a block heater so I don't need to let it warm as much before driving though. I did drive my other car yesterday but I still maintain this technique
flyboy1100 is offline   Reply With Quote
Old 12-11-2012, 08:14 AM   #2599
deanm11
Scooby Newbie
 
Member#: 303800
Join Date: Dec 2011
Location: Northern NJ
Default

Quote:
Originally Posted by ST Eye View Post
I don't think it is a matter of "warming up all the extra gearing". For the CVT, the lockup doesn't enable when the transmission temp is low. Not sure if that is what you mean?

Anyways, regarding cold cars and MPG loss, all the cars I have driven do this. The engine is not running at operating temperature. One factor I believe is open loop fueling perhaps.
It's that it is open loop while the ECM program also is deliberately commanding rich fuel mixture. In theory it could run open loop all the time and not overall not necessarily run overly rich/waste fuel.
deanm11 is offline   Reply With Quote
Old 12-11-2012, 11:53 AM   #2600
saabarupp
Scooby Specialist
 
Member#: 189032
Join Date: Sep 2008
Chapter/Region: MAIC
Location: Pittsburgh
Vehicle:
2015 STI CWP
'12 Impreza Sport Ltd DGM

Default

Quote:
Originally Posted by thom52 View Post
Question...
Consensus seems to be that part of the significant consumption hit for the first couple of miles is warming up all the extra gearing for AWD.

How does sitting in the driveway with the engine running, help warm up the AWD gear oil? Seems like that would be an arguement in support of the "drive gently for warmup" theory for the shortest distance to a "warmed up" AWD car, and therefore much improved mpg.
In automatics the transmission "cooler" is conversely a transmission "warmer" when it is cold out. Of course, it will still warm up faster if you drive it.
saabarupp is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
New Impreza owner, low mpg? stuffedcabbage Newbies & FAQs 34 09-25-2012 10:10 PM
2012 Impreza Reviewed - Whytecliff to Seymour brendan_mac Vancouver Impreza Club Forum -- VIC 16 12-23-2011 01:12 PM
NJ Impreza owners - sighting Dan G General Forum Archive 76 10-06-2000 12:24 AM
Md or Va Impreza owners - I have an Impreza related question. Snoopy General Forum Archive 1 06-05-2000 08:08 AM


All times are GMT -4. The time now is 04:09 PM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2015, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2015 Axivo Inc.
Copyright ©1999 - 2015, North American Subaru Impreza Owners Club, Inc.