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Tom Korth
Guest
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 Posted:
Sat Dec 04, 2004 5:41 am Post subject:
Re: Bad Gas Mileage with 2005 330i BMW with Performance Pack |
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"Kent Lewis" <kent_lewis@excite.com> wrote in message
news:af351754.0412022048.66b1bb90@posting.google.com...
| Quote: | My new 330i is a steptronic automatic with 18s, and as you may already
know, modified chip, camshaft and final drive (as part of the
Performance Package). After getting 14 MPG on my first tank, I took
it "easy" on the second and third tanks (I'm at 720 miles total now)
and the best I could get was a 14.5 average. When I reset the MPG
trip computer for a long highway trip, I managed a whopping 24, with
no city driving. I just refilled and am doing city driving and
kicking ass with a 12.8 MPG average after a quarter tank.
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Have you checked the accuracy of the OBC figures against the actual measured
gas consumption? My BMW's have had a 6% to 10% discrepancy, albeit with the
OBC higher than the true gas mileage. FWIW, my Z4 3.0 6-speed gets about 22
in city-suburban driving, and 28-32 on the highway (lighter vehicle, but
higher Cd).
Tom
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John Stone
Guest
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| Posted:
Sat Dec 04, 2004 5:41 am Post subject:
Re: Bad Gas Mileage with 2005 330i BMW with Performance Pack |
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in article af351754.0412030918.61714421@posting.google.com, Kent Lewis at
kent_lewis@excite.com wrote on 12/3/04 11:18 AM:
| Quote: |
The Performance Package is a $3,900 factory extra developed by BMW
Individual, an arm that used to tweak out 750s. It's been an option
since 2004, so there should be some benchmarking, but the dealer
doesn't seem to know anything, and I haven't seen anything online that
refutes the posted mileage of 17/27 or 21/30 except my own cars poor
performance. I'm planning on stopping other 330i PP owners on the
streets and asking them, which is about all I can figure on doing at
this point, besides accepting that BMW doesn't care their small cars
suck gas like an SUV.
Are you running premium fuel? |
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Jason G
Guest
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| Posted:
Sat Dec 04, 2004 10:09 pm Post subject:
Re: Bad Gas Mileage with 2005 330i BMW with Performance Pack |
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In article <soWdnUiG9P652CzcRVn-3A@comcast.com>, Tom Korth says...
| Quote: | FWIW, my Z4 3.0 6-speed gets about 22
in city-suburban driving, and 28-32 on the highway (lighter vehicle, but
higher Cd).
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Cd? Cubic displacement? The OP has a 330i. Same engine, isn't it?
--
Jason G
"This isn't a matter of being tolerant;
it's a matter of being sane." --REP, a.s.c.
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Tom Korth
Guest
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| Posted:
Sat Dec 04, 2004 11:08 pm Post subject:
Re: Bad Gas Mileage with 2005 330i BMW with Performance Pack |
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"Jason G" <jrgusenet@yahoo.REMOVE-x-THIS-x-PART.com> wrote in message
news:cosr0902419@drn.newsguy.com...
| Quote: | In article <soWdnUiG9P652CzcRVn-3A@comcast.com>, Tom Korth says...
FWIW, my Z4 3.0 6-speed gets about 22
in city-suburban driving, and 28-32 on the highway (lighter vehicle, but
higher Cd).
Cd? Cubic displacement? The OP has a 330i. Same engine, isn't it?
Drag Coefficient = 0.31 for the 330i and 0.35 for the Z4. |
Tom |
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Jason G
Guest
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| Posted:
Sun Dec 05, 2004 2:39 am Post subject:
Re: Bad Gas Mileage with 2005 330i BMW with Performance Pack |
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In article <CbOdndfzHYpgYSzcRVn-1Q@comcast.com>, Tom Korth says...
| Quote: |
FWIW, my Z4 3.0 6-speed gets about 22
in city-suburban driving, and 28-32 on the highway (lighter vehicle, but
higher Cd).
Cd? Cubic displacement? The OP has a 330i. Same engine, isn't it?
Drag Coefficient = 0.31 for the 330i and 0.35 for the Z4.
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Ah. But, wow, a 330 has LESS drag than a Z4? Whodathunkit?
--
Jason G
"This isn't a matter of being tolerant;
it's a matter of being sane." --REP, a.s.c. |
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Raybender
Guest
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| Posted:
Sun Dec 05, 2004 4:41 am Post subject:
Re: Bad Gas Mileage with 2005 330i BMW with Performance Pack |
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Kent Lewis wrote:
| Quote: | The Performance Package is a $3,900 factory extra developed by BMW
Individual, an arm that used to tweak out 750s. It's been an option
since 2004, so there should be some benchmarking, but the dealer
doesn't seem to know anything, and I haven't seen anything online that
refutes the posted mileage of 17/27 or 21/30 except my own cars poor
performance. I'm planning on stopping other 330i PP owners on the
streets and asking them, which is about all I can figure on doing at
this point, besides accepting that BMW doesn't care their small cars
suck gas like an SUV.
KjL
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I think your mileage is quite poor - I'd sure check things like fuel system pressure and O2 sensors.
Also, are you sure DME gets an engine fully warmed signal from the temp sensors?
Good Luck. Something is definitely broken.
Frank |
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Dan Drake
Guest
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| Posted:
Sun Dec 05, 2004 5:40 am Post subject:
Re: Bad Gas Mileage with 2005 330i BMW with Performance Pack |
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On 4 Dec 2004 13:39:30 -0800, Jason G
<jrgusenet@yahoo.REMOVE-x-THIS-x-PART.com> wrote:
| Quote: | In article <CbOdndfzHYpgYSzcRVn-1Q@comcast.com>, Tom Korth says...
FWIW, my Z4 3.0 6-speed gets about 22
in city-suburban driving, and 28-32 on the highway (lighter vehicle, but
higher Cd).
Cd? Cubic displacement? The OP has a 330i. Same engine, isn't it?
Drag Coefficient = 0.31 for the 330i and 0.35 for the Z4.
Ah. But, wow, a 330 has LESS drag than a Z4? Whodathunkit?
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It's not about size. It's seldom intuitive, either. Drag (or Cd) is
a function of the cross-section. Something with a very large cross
section can have a lower Cd than something with a much smaller cross
section. Scary thought, but an 18-wheeler could possibly have a
better drag coefficient than your little coupe.
--
Dan Drake |
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fbloogyudsr
Guest
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| Posted:
Sun Dec 05, 2004 5:40 am Post subject:
Re: Bad Gas Mileage with 2005 330i BMW with Performance Pack |
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"Dan Drake" <ddrake@comcast.notthis.net> wrote
| Quote: | On 4 Dec 2004 13:39:30 -0800, Jason G
Ah. But, wow, a 330 has LESS drag than a Z4? Whodathunkit?
It's not about size. It's seldom intuitive, either. Drag (or Cd) is
a function of the cross-section. Something with a very large cross
section can have a lower Cd than something with a much smaller cross
section. Scary thought, but an 18-wheeler could possibly have a
better drag coefficient than your little coupe.
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That is *NOT* a good explanation. Cd stands for Coefficient of drag.
Drag is a measure of force. Cross-section (commonly called frontal
area in discussions of drag) is how big the car (or whatever) is in
silhouette from the front. Drag = Cd * Area.
A semi has a very large frontal area, and low Cd. They are not likely
to have less Drag than any car, even if you fit it with all sorts of
fairings
to lower the Cd.
A Z4 has a larger Cd (than a 330i) and small area, so it's *total* drag is
(probably) lower than a 330i, which has a larger area.
FYI, the 5 series has a better Cd than either Z3 or 330i - it's longer
and is able to keep airflow attached better. That's the reason that
an E39 530i gets better highway mileage than an E56 330i.
Floyd |
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John Carrier
Guest
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| Posted:
Sun Dec 05, 2004 2:59 pm Post subject:
Re: Bad Gas Mileage with 2005 330i BMW with Performance Pack |
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"Jason G" <jrgusenet@yahoo.REMOVE-x-THIS-x-PART.com> wrote in message
news:cotaqi0h36@drn.newsguy.com...
| Quote: | In article <CbOdndfzHYpgYSzcRVn-1Q@comcast.com>, Tom Korth says...
FWIW, my Z4 3.0 6-speed gets about 22
in city-suburban driving, and 28-32 on the highway (lighter vehicle, but
higher Cd).
Cd? Cubic displacement? The OP has a 330i. Same engine, isn't it?
Drag Coefficient = 0.31 for the 330i and 0.35 for the Z4.
Ah. But, wow, a 330 has LESS drag than a Z4? Whodathunkit?
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Not necessarily so. Cd is drag coefficient, not total drag. You must
factor in effective frontal area.
R/ John |
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Dan Drake
Guest
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| Posted:
Sun Dec 05, 2004 5:02 pm Post subject:
Re: Bad Gas Mileage with 2005 330i BMW with Performance Pack |
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On Sat, 4 Dec 2004 19:57:35 -0800, "fbloogyudsr"
<fbloogyudsr@nwlink.com> wrote:
| Quote: | "Dan Drake" <ddrake@comcast.notthis.net> wrote
On 4 Dec 2004 13:39:30 -0800, Jason G
Ah. But, wow, a 330 has LESS drag than a Z4? Whodathunkit?
It's not about size. It's seldom intuitive, either. Drag (or Cd) is
a function of the cross-section. Something with a very large cross
section can have a lower Cd than something with a much smaller cross
section. Scary thought, but an 18-wheeler could possibly have a
better drag coefficient than your little coupe.
That is *NOT* a good explanation. Cd stands for Coefficient of drag.
|
As I said, the important word is 'coefficient.' Why is that not a
good explanation? Maybe I should have made it plainer that I was
pointing up the error a lot of people make, thinking that Cd measures
the actual force of drag on an object.
| Quote: | Drag is a measure of force. Cross-section (commonly called frontal
area in discussions of drag) is how big the car (or whatever) is in
silhouette from the front. Drag = Cd * Area.
A semi has a very large frontal area, and low Cd. They are not likely
to have less Drag than any car, even if you fit it with all sorts of
fairings
to lower the Cd.
|
The point is that the semi *can* have a lower Cd that your coupe. I
never said I thought it might have less drag. It's just a way of
illustrating what Cd actually is. A house brick has a much worse Cd
than your coupe, but *way* less drag.
| Quote: | FYI, the 5 series has a better Cd than either Z3 or 330i - it's longer
and is able to keep airflow attached better. That's the reason that
an E39 530i gets better highway mileage than an E56 330i.
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*One* reason, maybe. It's not the *only* one.
--
Dan Drake |
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GRL
Guest
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| Posted:
Wed Dec 08, 2004 5:40 am Post subject:
Re: Bad Gas Mileage with 2005 330i BMW with Performance Pack |
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2003 330i ZHP. At a steady 70-72 mph average (cruise control) it gives just
under 30 mpg. In loose suburban style driving it gives low 20's.
Either you are flogging the poor thing too hard (for good mpg) or there is
something very wrong, at least as far as the highway number goes. If you do
city-core type city driving, I can easily see your 14 mpg.
"Kent Lewis" <kent_lewis@excite.com> wrote in message
news:af351754.0411302102.7c64dba8@posting.google.com...
| Quote: | I recently purchased a 2005 BMW 330i with performance package and
absolutely love driving it. Unfortunately, I've been alarmed by the
poor gas mileage thus far (3 tanks worth): 14 city/24 highway. Has
anyone had this experience with their 330i with performance package?
The brochures say it should get 21/30 and the sticker on the car said
17/27, but I don't think Humvee mileage is acceptable for a 3 series.
My research indicates the larger tires and aero kit may be hurting top
end mileage, but I don't think the chip and exhaust should hurt city
driving. The dealership is getting back to me on this issue.
I appreciate your insights.
-Bummer Owner |
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Dave Plowman (News)
Guest
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| Posted:
Fri Dec 10, 2004 6:14 pm Post subject:
Re: Bad Gas Mileage with 2005 330i BMW with Performance Pack |
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In article <1102698851.818013.294420@f14g2000cwb.googlegroups.com>,
<kent_lewis@excite.com> wrote:
| Quote: | I absolutely love driving the 330i, and the performance package
certainly gives it that edge on the streets, but I'm sacrificing quite a
bit of efficiency with it.
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If you're heavy footed, then you'll pay for it at the pumps.
I asked what car or whatever you drove before and what you got with that?
--
*Hang in there, retirement is only thirty years away! *
Dave Plowman dave@davenoise.co.uk London SW
To e-mail, change noise into sound. |
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Guest
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| Posted:
Fri Dec 10, 2004 10:14 pm Post subject:
Re: Bad Gas Mileage with 2005 330i BMW with Performance Pack |
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I took the 330i with Performance Package into the dealerhship to run
diagnostics yesterday, and the didn't find anything. They determined
that the poor gas mileage is primarily due to the following factors:
-the engine hasn't been broken in (it will improve in the next few
thousand miles
-it's an automatic
-it has the modified chip that sucks more fuel
Based on what I've heard from others in the newsgroups (thank you all
by the way) my mileage is on the low end, but not unheard of based on
the situation. I can't say I'm pleased with the results of all this
research, but at least I've documented the mileage with the
dealer/factory and will keep monitoring and tracking mileage to look
for anticipated improvement. I absolutely love driving the 330i, and
the performance package certainly gives it that edge on the streets,
but I'm sacrificing quite a bit of efficiency with it.
KjL |
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