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Old 03-30-2005, 11:14 PM   #1
02_Forester
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Member#: 11015
Join Date: Oct 2001
Chapter/Region: MAIC
Location: Northern VA
Vehicle:
'06 Volvo V70R
Sonic Blue

Default Summer blend MPG improvement ?

My fuel economy has mysteriously improved from a steady 19 MPG to high 21.x MPG.

The only thing I can think of is that my Sunoco has switched to the summer blend fuel (running 93octane). I fill up at the same station and same pump. And on average conditions have been the same for the past few weeks.

anyone else notice a bump up in fuel economy lately?
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Old 03-31-2005, 08:24 AM   #2
TurboBaja
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Member#: 72618
Join Date: Oct 2004
Location: Waiting for BAJA icon...
Vehicle:
2005 Baja Turbo
Garnet Pearl

Default

my last tank was over 21 as well, usually I am between 19 and 20mpg. I did pay $2.26 a gallon for it, so maybe it was better gas

I've got an uppipe on the way, so that should help lower my mileage a bit
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Old 03-31-2005, 07:28 PM   #3
su-be3
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Join Date: Jan 2005
Location: Waterford, NY
Vehicle:
2004 BAJA Turbo
Frost Pearl White

Cool

Yup, I'm starting to notice it too. I use Mobil 93 as much as possible, and I am seeing 21 to 22 mpg now. Car seems to be responding a little better too.
I am paying $2.459 a gallon in my area. I hope they are wrong, but I don't see it getting any better for a while.
I keep track and order diesel fuel for my company, and this market is just so crazy right now! And the sad part is, there is NO reason for it to be this way.
Pure speculation is what it is!
If you haven't heard yet, some are saying the price of oil may spike out at $105.00 a barrel. So, that's somewhere in the $5.00 to $5.25 a gallon range! Be thankful you have a Subaru, and not a Hummer, right about now!
Keep it under 90, folks!
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Old 03-31-2005, 08:02 PM   #4
sir_wagon
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Location: Mid-Atlantic Region
Default

The closer you are to 45 F to 65 F, the better the gas mileage. At low temps (<35 F), you also have heat losses affecting your gas mileage.

When it is hot outside (> 85), the heat differential between the motor (a thermodynamic heat engine), and the outside, starts to diminish, so you also start loosing efficiency.
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Old 03-31-2005, 10:01 PM   #5
YooperBaja
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Member#: 64311
Join Date: Jun 2004
Location: Northern Michigan
Vehicle:
2003 Baja
Silver

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I noticed the first two posts have 2005 models. I have seen it posted several times, and experienced it with mine too, that the gas mileage increases after the motor is broke in.

For what is worth.... I had 27.7 mpg this weekend (389.0 miles on 13.97 gallons)driving 72 mph. I was loaded with a recliner chair and a bunch of other stuff in the back (chair stuck up over the roof by 6 inches). I also was loaded inside with all 4 members of my family and weekend luggage. Mine is not a turbo and it wasn't my best mileage (which was 30+ mpg), but I thought it was respectable considering the load.

My two cents worth..... and worth every penny of it!
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Old 04-01-2005, 08:38 AM   #6
TurboBaja
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Garnet Pearl

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Hi Yooper,

I've got 12k miles on mine, so I think it should be considered 'broken in'. The difference in my milage is probably just due to my driving style changes, I can't think of anything I am doing different, but there may be something. Also, I am due for an oil change. I don't know how much 'old' oil affects the Baja, but a long time ago in a state far, far away, I had a Mazda GLC and on 'new' oil I would get 36+ mpg and on 'old' (5000 mile) oil I would get 30 mpg. The Baja gets new oil every 3500 miles.
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Old 04-01-2005, 01:10 PM   #7
02_Forester
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'06 Volvo V70R
Sonic Blue

Default

I did change my oil two weeks ago - Mobil 1 5/30. I didn't think it would play a role, but perhaps combined with warmer weather and summer blend fuel would account for the bump.

So many variables.
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Old 04-01-2005, 11:19 PM   #8
mbaksic
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Member#: 78280
Join Date: Dec 2004
Location: Mukwonago, WI.
Vehicle:
2003 Baja Classic
Regatta Red/Silver

Default

I just gassed up tonite and checked mileage. 25.2 this tank. Thats about where it will stay from now on unless I am on a trip. Best of 31.1 last summer, homeward bound from Yooperland back to SE Wisconsin. Mike
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Old 04-09-2005, 02:40 PM   #9
shibster
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2003 Baja
Black/Silver

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I got 26,000 miles on now and I consistently get 22-23 mpg on my '03 NA Baja. I change oil regularly at 4000 miles with mobil1, but it never makes a difference. Highway, city driving or a combination of the two give the same result. Does anyone else exhibit this pattern with their Baja??
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Old 04-11-2005, 10:47 PM   #10
jason.bogdan
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Member#: 82812
Join Date: Mar 2005
Location: wny
Vehicle:
2005 Baja Turbo
Monterey Gray

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Quote:
I noticed the first two posts have 2005 models. I have seen it posted several times, and experienced it with mine too, that the gas mileage increases after the motor is broke in.
What would you say is "broke in"? I just hit 1500, my mpg has evend out a little, but the last 3 tanks have only been about 18 to the gallon ...
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Old 04-11-2005, 11:30 PM   #11
02_Forester
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Member#: 11015
Join Date: Oct 2001
Chapter/Region: MAIC
Location: Northern VA
Vehicle:
'06 Volvo V70R
Sonic Blue

Default

Some motors take 20k miles to be completely "broke-in"

One of our members on Swedespeed.com has been getting regular oil analysis on his S60R and around the 21k mile oil change the analysis revealed stability. Here's a link to the report: http://www.s60r.net/car/blackstone/C32067.pdf

I sent my first oil change from the Baja to Blackstone. It will be interesting to see how it wears over the next 10-20k miles.
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