sudden drop in gas mileage in 2000 BMW 323i

Hi,

For the past 1 month, I am noticing that the mileage is dropped at
least by 15-20%. Could anyone suggest what could be the problem for
that?

Thanks,
nkveni

(nkveni) wrote in
om:

> Hi,
>
> For the past 1 month, I am noticing that the mileage is dropped at
> least by 15-20%. Could anyone suggest what could be the problem for
> that?
>
> Thanks,
> nkveni
>

Had a tune up recently?

Thanks for the reply.

Did not do any tuneup. But it has been 14-15 months without an oil
service. The last oil service was with Inspection1 14 months ago and
then got break fluid and coolant service around 6 months ago.

Can the fact that it has been a while without oil service result in
less gas mileage?

Thanks and best regards,
nkveni

(nkveni) wrote in
om:

> Thanks for the reply.
>
> Did not do any tuneup. But it has been 14-15 months without an oil
> service. The last oil service was with Inspection1 14 months ago and
> then got break fluid and coolant service around 6 months ago.
>
> Can the fact that it has been a while without oil service result in
> less gas mileage?
>
> Thanks and best regards,
> nkveni
>

I'm no mechanic guru, but if your fuel economy is going down drastically
the first thing that comes to mind is that you're running too rich -- so
you're sending more fuel than you can burn, so some is ending up expelled
via the exhaust. I'd get a tune up -- get the valves ajusted, get the
ignition checked, new spark plugs, oil change etc. Your mechanic could
tell via gastester if you're out of spec for fuel/air ratio and set it
right.

If its been a while you're probably due -- your car will love you for it

z > wrote in message >...
> I'm no mechanic guru, but if your fuel economy is going down drastically
> the first thing that comes to mind is that you're running too rich -- so
> you're sending more fuel than you can burn, so some is ending up expelled
> via the exhaust. I'd get a tune up -- get the valves ajusted, get the
> ignition checked, new spark plugs, oil change etc. Your mechanic could
> tell via gastester if you're out of spec for fuel/air ratio and set it
> right.
>
> If its been a while you're probably due -- your car will love you for it
>

Valves aren't adjustable. If it's a sudden drop then suspect
something like the O2 sensor.

Of course, if it's just turned cold where you are you'll get a drop in
mileage due to the colder starts.

Are you by any chance in that other hemisphere were it's warming up instead
of cooling down now? Did you start using the A/C a lot lately?
Richard
"nkveni" > wrote in message
om...
> Hi,
>
> For the past 1 month, I am noticing that the mileage is dropped at
> least by 15-20%. Could anyone suggest what could be the problem for
> that?
>
> Thanks,
> nkveni

My guess is your getting your first taste of winter fuel Your miles per
gallon will suffer while they sell the oxygenated fuel. Just a
thought...and your oil could also be turning to sludge. Get it out now!!!

--

"marlinspike" > wrote in message
...
> Are you by any chance in that other hemisphere were it's warming up
instead
> of cooling down now? Did you start using the A/C a lot lately?
> Richard
> "nkveni" > wrote in message
> om...
> > Hi,
> >
> > For the past 1 month, I am noticing that the mileage is dropped at
> > least by 15-20%. Could anyone suggest what could be the problem for
> > that?
> >
> > Thanks,
> > nkveni
>
>

(adder) wrote in
om:

> z > wrote in message
> >...
>> I'm no mechanic guru, but if your fuel economy is going down
>> drastically the first thing that comes to mind is that you're running
>> too rich -- so you're sending more fuel than you can burn, so some is
>> ending up expelled via the exhaust. I'd get a tune up -- get the
>> valves ajusted, get the ignition checked, new spark plugs, oil change
>> etc. Your mechanic could tell via gastester if you're out of spec
>> for fuel/air ratio and set it right.
>>
>> If its been a while you're probably due -- your car will love you for
>> it
>
> Valves aren't adjustable. If it's a sudden drop then suspect
> something like the O2 sensor.
>
There are no valve adjustments on a 2000 ?? On my 74tii you can certainly
adjust them -- but like I said i'm no mechanic guru (+30 years out of
date).

"z" > wrote
> (adder) wrote
>> Valves aren't adjustable. If it's a sudden drop then suspect
>> something like the O2 sensor.
>>
> There are no valve adjustments on a 2000 ?? On my 74tii you can
> certainly
> adjust them -- but like I said i'm no mechanic guru (+30 years out of
> date).

This is a 2000 323i, not a 2002.
All BMWs (other than M3?) have had hydraulic tappets since M50
in '90 and the V8's in '93.

Floyd

"fbloogyudsr" > wrote in news:10n09kh8b6046e6
@corp.supernews.com:

> "z" > wrote
>> (adder) wrote
>>> Valves aren't adjustable. If it's a sudden drop then suspect
>>> something like the O2 sensor.
>>>
>> There are no valve adjustments on a 2000 ?? On my 74tii you can
>> certainly
>> adjust them -- but like I said i'm no mechanic guru (+30 years out of
>> date).
>
> This is a 2000 323i, not a 2002.
> All BMWs (other than M3?) have had hydraulic tappets since M50
> in '90 and the V8's in '93.
>
> Floyd
>
>

cool

Well my point remains -- if you've not had a tuneup for a long time that
could be something to do if your gas mileage drops