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11-26-2012, 09:04 AM | #26 |
Scooby Specialist
Member#: 335330
Join Date: Oct 2012
Chapter/Region:
Tri-State
Location: NYC
Vehicle:2008 Impreza 5DR DGM |
You touched on running heater all the time. I noticed...unlike my other cars when the fan is set to zero and the temp is neutral, there's still substantial airflow from the vents. I know some is to be expected but it seemed to be more than other cars I've driven. I'm a cheapster and try to hypermile but how can I be sure it's completely off?
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11-26-2012, 02:45 PM | #27 |
Scooby Guru
Member#: 124254
Join Date: Aug 2006
Chapter/Region:
NESIC
Location: Rhode Island
Vehicle:2006 06 SGM Slowbaru "The Scoobinator" |
If the fan is set to zero, no power is being drawn. The airflow is because of high pressure at the intake, which is at the base of the windshield.
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11-26-2012, 07:07 PM | #28 |
Scooby Specialist
Member#: 335330
Join Date: Oct 2012
Chapter/Region:
Tri-State
Location: NYC
Vehicle:2008 Impreza 5DR DGM |
Another thing, I thought heat was "free" and the only cost was the fan as compared to the A/C which uses more resources. Correct me?
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11-26-2012, 08:17 PM | #29 |
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Member#: 124254
Join Date: Aug 2006
Chapter/Region:
NESIC
Location: Rhode Island
Vehicle:2006 06 SGM Slowbaru "The Scoobinator" |
The front defroster positions turn on the A/C compressor, so if you stay out of those, it will only draw power for the fan if you have it on. There may be thermodynamic concerns about removing heat from the system in cold weather, but I'm pretty sure that the engine produces more than enough even below freezing.
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11-26-2012, 09:41 PM | #30 |
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Member#: 294461
Join Date: Sep 2011
Chapter/Region:
NWIC
Location: Grass Pants, OR
Vehicle:2006 San Remo Wagon Under construction |
I'm going to "take one for the team" and try out ethanol free gasoline and see how much difference there is as opposed to the E15 winter blend. I've been tracking my fuel mileage for a little over 20k miles (I drive a lot) and thus far have seen as high as 26 on E10 and as low as 17 all last winter with a dodgy o2 sensor.
It would be my guess that the components of my older (97) car are designed to run on non ethanol gas as it were, and as such my improved power and mpgs will offset the added costs. Seems legit, right? |
11-27-2012, 11:58 PM | #31 | |
NASIOC Supporter
Member#: 30669
Join Date: Dec 2002
Chapter/Region:
Tri-State
Location: USA, North NJ, 07456
Vehicle:1998 Legacy 2.5GT Silver Sleeper BK, 5MT |
Quote:
PS, yes, my 1998 2.5 NA see's a mileage drop every year when winter gas arrives. |
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11-28-2012, 04:33 PM | #32 |
Scooby Newbie
Member#: 301247
Join Date: Nov 2011
Location: Toronto
Vehicle:09 Impreza 2.5i MT White |
my second tank of gas since i made this thread came out to 19mpg today. this included total avoidance of idling, more coasting and driving without brakes. lowest so far in my mileage log:
http://www.fuelly.com/driver/pickler/impreza i don't know if it's the evaporation or what not but it just sucks. my impreza is getting the lowest MPG of all my cars and this includes a 4000lbs, 2.3T RDX. question when your coasting below 45mph and drop in neutral does your rpms climb to ~1200rpm? Last edited by Pickler; 11-28-2012 at 04:55 PM. |
11-29-2012, 03:07 PM | #33 |
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Join Date: Sep 2011
Chapter/Region:
W. Canada
Location: I live in Edmonton
Vehicle:2011 Legacy 3.6R Silver |
J-hop,
I live in Edmonton where it has almost every year since I have been driving, 1971, hit -40degrees F/C, as they are equal at that temperature, for more than a few days. Anyone that complains about a loss of fuel mileage that is not in the -15 to -20 degrees F has absolutely nothing to complain about in my opinion. Also we have it pretty good compared to the folks living in North of us as they typically see much lower temperatures for a longer period of time. Regards, Outlaw57 |
11-29-2012, 03:10 PM | #34 |
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Join Date: Sep 2011
Chapter/Region:
NWIC
Location: Grass Pants, OR
Vehicle:2006 San Remo Wagon Under construction |
Decided to fill with Ethanol free yesterday. $4.499 per gallon; 28% more than E10 premium costs. By that math, I need to be averaging around 28mpgs on ethanol free for it to be a wash in cost. I do notice my car runs better and doesn't stumble when it's cold; in and of itself may be worth the added costs.
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11-29-2012, 09:34 PM | #35 | |
Scooby Specialist
Member#: 27258
Join Date: Oct 2002
Chapter/Region:
Tri-State
Location: in a van down by the river
Vehicle:who dat be dat was? |
Quote:
http://www.fueleconomy.gov/feg/ethanol.shtml If you want to see how to gauge ethanol pricing correctly, take a look at Brazil. http://en.wikipedia.org/wiki/Flexibl...cles_in_Brazil |
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11-30-2012, 07:43 AM | #36 |
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Member#: 217257
Join Date: Jul 2009
Location: Niagara Falls, Canada
Vehicle:2008 2.5i hatch Satin White Wrap |
just filled up yesterday, and got 17 mpg, average temp here last week -20c ~ -15c (~zero f) coming from someone who consistently averaged 33+ all summer
https://www.fuelly.com/driver/eduva1/impreza WINTER GAS SUCKS! |
11-30-2012, 08:41 PM | #37 | |
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Member#: 338546
Join Date: Nov 2012
Location: Po-town,NY
Vehicle:2003 Impreza RS Silver |
Quote:
Just winter sucks ie: cold Your loss of mileage is due to cold start up! Motors must run rich for the start up and there goes your mileage. If you have an air ratio gauge (wide or narrow band) it will show you how long it is rich. |
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12-02-2012, 04:55 PM | #38 | |
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Member#: 318428
Join Date: Apr 2012
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Quote:
ALWAYS try to run ethanol free gasoline. No cars come factory with the ability to properly run ethanol blended fuel with the exception of flex fuel vehicles. Ethanol contains oxygen in the molecular make up so even though it has a higher octane rating you can't truly benefit from it because your O2 sensor reads a lean condition (due to the added oxygen present in the ethanol)and your ecu tries to compensate by richening the mixture to the correct afr. As a result you get worse fuel economy(compounded by the lower energy content) |
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12-02-2012, 05:16 PM | #39 | |
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Member#: 304662
Join Date: Dec 2011
Chapter/Region:
MAIC
Vehicle:2001 Impreza L coupe Sedona red Pearl |
Quote:
Pump: "contains up to 10% ethanol" Last edited by ManualOverAuto; 12-02-2012 at 05:25 PM. |
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12-02-2012, 05:36 PM | #40 |
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Join Date: Apr 2012
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Yea it is probably pretty hard to find regular and mid grade in the non ethanol blended variety in the US. But you may still be able to get premium in a non ethanol blend if your car requires premium which probably doesn't apply to most in the NA forum.
I don't quite understand the US regulation but where I live gas stations are required to sell x% of their total volume as ethanol. Luckily this means reg and mid are often the ones blended but at most places the premium is not. |
12-02-2012, 05:45 PM | #41 |
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Join Date: Oct 2002
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I am not trying to argue that ethanol is better, I am simply saying that spending any time worrying about the ethanol content in E10 is a waste of time.
E10 is not harmful: All auto manufacturers approve the use of E10 in their vehicles. This means that the vehicles are designed to handle this level of ethanol. If they were not able to survive these conditions, you would see a huge trend in engine failures due to ethanol in the winter weather states. Even if you were to believe that some manufacturers have issues with E10, Subaru makes it's bread and butter in the winter climates (where E10 is more prevalent). Their reliability and longevity record is testament to the fact that E10 is not causing critical failures in Subarus. Cost of E10: 400 miles / 25 mpg * $4 per gal. = $64 in gas 400 miles / 24 mpg * $4 per gal. = $66.67 in E10. ($2.67 per tank difference) If I were to drive 4000 miles in the winter, the difference in cost would be $26.70 for the whole winter between E10 and pure gas. To look at it another way, at $4 per gallon, E10 costs you roughly $0.16 per gallon. |
12-02-2012, 05:47 PM | #42 |
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Join Date: Oct 2002
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Location: in a van down by the river
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The large corn farming community and their lobbyists might have something to do with that . There was a push a few years ago to raise E10 to E15.
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12-03-2012, 11:06 PM | #43 |
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Member#: 301247
Join Date: Nov 2011
Location: Toronto
Vehicle:09 Impreza 2.5i MT White |
my afr shows 13.8-14.4 cold start i will film a cold start tomo with my iphone and well see. the car has been off for 4 days in freezing temps. but tomo is supposed to get mild @40'f.
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12-04-2012, 11:00 PM | #44 | |
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12-05-2012, 10:24 PM | #45 |
Scooby Newbie
Member#: 301247
Join Date: Nov 2011
Location: Toronto
Vehicle:09 Impreza 2.5i MT White |
last night we had a cold snap (25'f) and so this morning when i started the car the AFR was stuck at 14.6 and not moving until car went into closed loop (i tried applying throttle, changing gears but it wouldn't change). strangely enough day before that with 48'f temps when i started the car AFR showed 12.7-13 for a bit then went to low 14s. im thinking something is wrong with my O2 sensor or perhaps it doesnt report AFR until its warm. If so when it's cold and O2 is not reporting AFR to ecu, and it is in open loop for a while, then it is probably pumping much more fuel than it expects (running very rich). tonight gonna be 10 degrees so ill keep my eye on afr again. my current average trip mileage is 20 MPG.
Last edited by Pickler; 12-05-2012 at 10:33 PM. |
12-05-2012, 11:07 PM | #46 |
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AKIC
Location: Palmer/Wasilla, Alaska
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25*F?! Man I wish we had those temps. In AK we're at -15*F and 20mph winds.
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12-05-2012, 11:09 PM | #47 |
Scooby Guru
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Location: Rhode Island
Vehicle:2006 06 SGM Slowbaru "The Scoobinator" |
25°F is not a cold snap.
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12-06-2012, 04:27 PM | #48 |
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Join Date: Nov 2011
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Vehicle:09 Impreza 2.5i MT White |
lol maybe im getting my Fahrenheit wrong, it was -10'c. it was 12'c the day before so it was a big drop in temp. and yes i expect no more than -15f in alaska lol. i'm driving up to churchil during the holidays with my impreza (followed by my friend with his toyota hilux). i have gotten the tire chains, extra battery and my fluids straight. i'm expecting -50'c windchill which i think is -60'f ?? and perhaps 10MPG with the rate my impreza is going with temp drops.
Last edited by Pickler; 12-06-2012 at 04:33 PM. |
12-06-2012, 04:28 PM | #49 |
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That's 14°F, which is almost a cold snap.
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12-06-2012, 07:51 PM | #50 |
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Location: Central California
Vehicle:2016 Legacy |
I just have the urge to note, that we just had a "cold snap". The low all week is going to be below, 50 degrees F.
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