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  #1 (permalink)  
Old 29 Jan 2007, 05:14 pm
John
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Default 2005 Accord - Sudden significant decline in miles/gal

Greetings,

My 2005 Accord EX (2.4L) did average of 28 miles per gallon for two years (since I got it in November 2004 until about begining of December 2006). I drive the same highway every day, same speeds (average of 75), same distance every day, went through the same seasons twice (summer/winter) in the same place. Nothing, and I mean absolutely nothing has changed in my driving habbits.

Then, sometime in begining of December 2006, all of a sudden I noticed a decline of about 20% in my fuel consumption...from average 28 to average 22.

Any one experienced this before? Any idea what could it be?

Thanks.
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  #2 (permalink)  
Old 29 Jan 2007, 05:45 pm
Elle
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Default Re: 2005 Accord - Sudden significant decline in miles/gal

Check items listed at
http://home.earthlink.net/~honda.lioness/id11.html .


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  #3 (permalink)  
Old 29 Jan 2007, 06:20 pm
Jim Yanik
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Default Re: 2005 Accord - Sudden significant decline in miles/gal

"Elle" <honda.lioness@nospam.earthlink.net> wrote in
news:SGvvh.20576$X72.12466@newsread3.news.pas.eart hlink.net:

> Check items listed at
> http://home.earthlink.net/~honda.lioness/id11.html .
>
>
>


and turn off the HTML and limit line length to <80 characters.
(per UseNet convention)

--
Jim Yanik
jyanik
at
kua.net
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  #4 (permalink)  
Old 29 Jan 2007, 09:12 pm
John
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Default Re: 2005 Accord - Sudden significant decline in miles/gal

Thanks for the link.

Is it possible that indeed something went caput, such as a valve, or
something? I mean, tire pressure or things like that cannot cause a 20%
decrease overnight.
The car is still under warranty.



"Elle" <honda.lioness@nospam.earthlink.net> wrote in message
news:SGvvh.20576$X72.12466@newsread3.news.pas.eart hlink.net...
> Check items listed at http://home.earthlink.net/~honda.lioness/id11.html .
>
>



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  #5 (permalink)  
Old 29 Jan 2007, 09:32 pm
Elle
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Default Re: 2005 Accord - Sudden significant decline in miles/gal

My first suspicions would be (1) unusual cold, which can
reduce efficiency a lot, like 10% lower fuel mileage; (2)
ethanol or whatever loaded gasoline, required in some parts
of the country; and (3) tire pressure drop; tire pressure
can change radically within a couple of weeks and will
easily reduce mileage by 5-10%. One should check the
pressure every two weeks.

How many miles are on this car? Are you following the
maintenance schedule for plugs, wires, and other ignition
parts? Admittedly it's a very young car by years...

Yes it's possible something went kaput, but I'd expect a
check engine light for the "kaput" item on such a recent
model. E.g. if the oxygen sensor was defective, you should
get a "code" indicating it's failing, and this would first
be indicated by the check engine light.

"John" <ein_shem@hotmail.com> wrote
> Thanks for the link.
>
> Is it possible that indeed something went caput, such as a
> valve, or something? I mean, tire pressure or things like
> that cannot cause a 20% decrease overnight.
> The car is still under warranty.
>
>
>
> "Elle" <honda.lioness@nospam.earthlink.net> wrote
>> Check items listed at
>> http://home.earthlink.net/~honda.lioness/id11.html .
>>
>>

>
>



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  #6 (permalink)  
Old 29 Jan 2007, 10:20 pm
Jim Yanik
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Default Re: 2005 Accord - Sudden significant decline in miles/gal

"John" <ein_shem@hotmail.com> wrote in
news:dq-dnY7GH86fJCPYnZ2dnUVZ_vipnZ2d@rcn.net:

> Thanks for the link.
>
> Is it possible that indeed something went caput, such as a valve, or
> something? I mean, tire pressure or things like that cannot cause a
> 20% decrease overnight.
> The car is still under warranty.
>
>
>
> "Elle" <honda.lioness@nospam.earthlink.net> wrote in message
> news:SGvvh.20576$X72.12466@newsread3.news.pas.eart hlink.net...
>> Check items listed at
>> http://home.earthlink.net/~honda.lioness/id11.html .
>>
>>

>
>


in winter months,gas suppliers change their mix of volatiles in the
gasoline,add up to 10% ethanol for absorbing water,and all that can affect
mileage.
Tire pressure does make a big difference,too.I've got a slow-leaking right
rear tire,and when it drops 5 lbs,the mileage drops noticeably.

--
Jim Yanik
jyanik
at
kua.net
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  #7 (permalink)  
Old 30 Jan 2007, 05:32 am
John
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Default Re: 2005 Accord - Sudden significant decline in miles/gal

The car has 27K miles on it.

I checked tire pressure - it is right where it suppose to be.

The reason why I think it's not cold weather and/or a change in fuel "ingredients" is that as I said, I have the car since November 2004 and I drove it since then during two winters, two summers, exact same roads and driving conditions....I mean literally nothing has changed.
Also, this behavior started as I mentioned in the beginning of December and we had an unusual mild December here in New England, so I don't think it is weather related (even if it was unusually cold, I went through two previous very cold winters).

Is it possible that something is partially not functioning (like a semi-blocked valve or filter) in a way that it will not trigger the check-engine light?

I think I'm gonna have to take it to service...hoping they find something.

Thanks guys.


"Jim Yanik" <jyanik@abuse.gov> wrote in message news:Xns98C7ED755F254jyanikkuanet@64.209.0.87...
> "John" <ein_shem@hotmail.com> wrote in
> news:dq-dnY7GH86fJCPYnZ2dnUVZ_vipnZ2d@rcn.net:
>
>> Thanks for the link.
>>
>> Is it possible that indeed something went caput, such as a valve, or
>> something? I mean, tire pressure or things like that cannot cause a
>> 20% decrease overnight.
>> The car is still under warranty.
>>
>>
>>
>> "Elle" <honda.lioness@nospam.earthlink.net> wrote in message
>> news:SGvvh.20576$X72.12466@newsread3.news.pas.eart hlink.net...
>>> Check items listed at
>>> http://home.earthlink.net/~honda.lioness/id11.html .
>>>
>>>

>>
>>

>
> in winter months,gas suppliers change their mix of volatiles in the
> gasoline,add up to 10% ethanol for absorbing water,and all that can affect
> mileage.
> Tire pressure does make a big difference,too.I've got a slow-leaking right
> rear tire,and when it drops 5 lbs,the mileage drops noticeably.
>
> --
> Jim Yanik
> jyanik
> at
> kua.net

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  #8 (permalink)  
Old 30 Jan 2007, 08:15 am
John
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Posts: n/a
Default Re: 2005 Accord - Sudden significant decline in miles/gal

Do you want to hear even more? You may call me crazy, but I swear it's true.

All of a sudden, the Trip meter (Trip A) shows that the distance from my home to my office is 16 miles, when it was always only 15 miles....
At the same time, the odometer shows less miles that I should probably have, and I am keeping a good look at that because my car is leased and I am constantly monitoring this so that I won't exceed my 'allowance'.
Again, you may think I drank something, I am telling you I didn't.

Is this possible?


"John" <ein_shem@hotmail.com> wrote in message news:UISdnXA6d9NL4iPYnZ2dnUVZ_veinZ2d@rcn.net...
Greetings,

My 2005 Accord EX (2.4L) did average of 28 miles per gallon for two years (since I got it in November 2004 until about begining of December 2006). I drive the same highway every day, same speeds (average of 75), same distance every day, went through the same seasons twice (summer/winter) in the same place. Nothing, and I mean absolutely nothing has changed in my driving habbits.

Then, sometime in begining of December 2006, all of a sudden I noticed a decline of about 20% in my fuel consumption...from average 28 to average 22.

Any one experienced this before? Any idea what could it be?

Thanks.
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  #9 (permalink)  
Old 30 Jan 2007, 08:34 am
sapper
Guest
 
Posts: n/a
Default Re: 2005 Accord - Sudden significant decline in miles/gal

Tire pressure would do it. I noticed on two cars that the tire
pressure had dropped by 2 to 3 psi in all 8 tires. The only culprit I
can ththink of is the cold snap here in the NE.

On Jan 30, 9:15 am, "John" <sbnos...@gmail.com> wrote:
> Do you want to hear even more? You may call me crazy, but I swear it's true.
>
> All of a sudden, the Trip meter (Trip A) shows that the distance from my home to my office is 16 miles, when it was always only 15 miles....
> At the same time, the odometer shows less miles that I should probably have, and I am keeping a good look at that because my car is leased and I am constantly monitoring this so that I won't exceed my 'allowance'.
> Again, you may think I drank something, I am telling you I didn't.
>
> Is this possible?
>
> "John" <ein_s...@hotmail.com> wrote in messagenews:UISdnXA6d9NL4iPYnZ2dnUVZ_veinZ2d@rcn.n et...
> Greetings,
>
> My 2005 Accord EX (2.4L) did average of 28 miles per gallon for two years (since I got it in November 2004 until about begining of December 2006). I drive the same highway every day, same speeds (average of 75), same distance every day, went through the same seasons twice (summer/winter) in the same place. Nothing, and I mean absolutely nothing has changed in my driving habbits.
>
> Then, sometime in begining of December 2006, all of a sudden I noticed a decline of about 20% in my fuel consumption...from average 28 to average 22.
>
> Any one experienced this before? Any idea what could it be?
>
> Thanks.


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  #10 (permalink)  
Old 30 Jan 2007, 08:46 am
John
Guest
 
Posts: n/a
Default Re: 2005 Accord - Sudden significant decline in miles/gal

Again - it happened before the cold. December was pretty mild.
Also, I checked tire pressure and run a full tank on perfectly inflated tires and got the same results. And I am not talking about a 20% (!) decrease...that's far and beyond a decrerase that you would get if your tires are not inflated correctly.


"sapper" <sapper268@gmail.com> wrote in message news:1170167678.822300.286240@k78g2000cwa.googlegr oups.com...
> Tire pressure would do it. I noticed on two cars that the tire
> pressure had dropped by 2 to 3 psi in all 8 tires. The only culprit I
> can ththink of is the cold snap here in the NE.
>
> On Jan 30, 9:15 am, "John" <sbnos...@gmail.com> wrote:
>> Do you want to hear even more? You may call me crazy, but I swear it's true.
>>
>> All of a sudden, the Trip meter (Trip A) shows that the distance from my home to my office is 16 miles, when it was always only 15 miles....
>> At the same time, the odometer shows less miles that I should probably have, and I am keeping a good look at that because my car is leased and I am constantly monitoring this so that I won't exceed my 'allowance'.
>> Again, you may think I drank something, I am telling you I didn't.
>>
>> Is this possible?
>>
>> "John" <ein_s...@hotmail.com> wrote in messagenews:UISdnXA6d9NL4iPYnZ2dnUVZ_veinZ2d@rcn.n et...
>> Greetings,
>>
>> My 2005 Accord EX (2.4L) did average of 28 miles per gallon for two years (since I got it in November 2004 until about begining of December 2006). I drive the same highway every day, same speeds (average of 75), same distance every day, went through the same seasons twice (summer/winter) in the same place. Nothing, and I mean absolutely nothing has changed in my driving habbits.
>>
>> Then, sometime in begining of December 2006, all of a sudden I noticed a decline of about 20% in my fuel consumption...from average 28 to average 22.
>>
>> Any one experienced this before? Any idea what could it be?
>>
>> Thanks.

>

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