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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N57 / M57 Turbo Diesel Discussions - 335d > POLL: Did Your Car Experience an MPG Decrease Since Performing Emissions/EGR Recall



View Poll Results: Is Your Car Experiencing an MPG Decrease Since Performing Emissions/EGR Recall
Yes 28 60.87%
No 18 39.13%
Voters: 46. You may not vote on this poll

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      08-17-2012, 11:51 AM   #23
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Let u know in ~3 weeks when I can compare year over year data.
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      09-02-2012, 11:27 PM   #24
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My mileage seems to have reduced by about 10-15% on average with mixed driving (some aggressive some passive)--30 to 27. The biggest thing I've noticed though is that I can no longer get great mileage when trying. I used to be able to obtain 35-45 on long highway trips if I was being mindful of the needle, but those days are long gone. I find myself not pushing for the 35 number.

Overall though, the performance (efficiency) and performance (power) are still as amazing as ever.
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      09-03-2012, 08:33 AM   #25
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Quote:
Originally Posted by cowbell View Post
Just got done with a long road trip with the kids. 6 Days

Started with full tank in Northern California, near Sacramento.
Day 1: NorCal -> Bend, OR; filled up, but still had over 1/4 tank. 35.3 MPG
Day 2: Bend - > Hermiston, OR
Day 4: Hermiston -> Portland; filled up, gas light just came on. 34.7 MPG
Day 5: Portland -> Grants Pass, OR
Day 6: Grants Pass -> NorCal (Made a stop at Shasta Lake to see the caverns and in Redding to see the Sundial Bridge)

Filled up at home, running on fumes with 5 miles to empty, 34.7 MPG

Now this was almost all freeway driving at or just above speed limit as I was trying to get exceptional MPG's.
I now have over 18K on the odometer.

When I first got the car we did a road trip from Norcal to San Diego. I managed over 39 MPG on that trip and I was not trying at that time.


All MPG calculated using iPhone app called Car Care.


I took car in for service yesterday and mentioned the decreased MPG since the recall was done. SA didn't really have much to say about why that recall would result in lower MPG's.
This is EXACTLY what I am talking about! These results are not much better than the 335i. I use to be able to throttle the car around town or on the highway and I could still achieve fantastic mileage -- I didn't have to TRY. My latest tank shows 15mpg's city!!! Granted that's calculated by the DME at an avg mph of 15, but still!

BMW sold us a car that performed at a certain level and after the sale they decide to change the game negatively impacting a certain performance charateristic for which many of us was the reason we bought the car. Sorry but BMW cannot do that...

Call BMW NA and COMPLAIN.
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      09-06-2012, 03:14 PM   #26
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Quote:
Originally Posted by Socom View Post
Let u know in ~3 weeks when I can compare year over year data.
No changes for me.
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      09-06-2012, 07:17 PM   #27
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2009 BMW 335d  [3.75]
Last tank I did 560 kms (350 miles) all city driving with no highway and spirited driving for sure.
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      09-07-2012, 06:36 AM   #28
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Ok amigos Im getting anywhere from 21-22 mpg in the city almost the same as pre time, I guess as someone had stated it was a matter of time till the new program adapted to you.
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      09-08-2012, 09:44 PM   #29
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I haven't noticed a lot of change in fuel economy since the recall, but if anything it is better. City is the same 550-680km per tank depending on driving and drivers. I just managed a best highway of 960km on a tank and am confident I could get over 1000 if fuel stops were spaced accordingly. No complaints. Works out to 6.25L/100km or 38 mpg(US). I do think the car sounds different after the recall.
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      09-09-2012, 06:32 PM   #30
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The best mpg I have gotten through my '11 335d m-sport is ~31mpg. That is Los Angeles to Vegas and back in one tank, 500 round trip on 16 gallons. The OBC at that time read about 28 mpg. I actually brought my car in for two separate recalls and don't remember exactly what they were for but I do know that my mpg on the OBC went down each time. After the first recall my mpg dropped to 24.5 mpg on the OBC although I did not get any actual data. I brought the car in for service and I'm informed there is another recall. I told my service advisor about my horrible mpg but he didn't hear anything about other 335d's having poor gas milage. I get my car back and in like 2 days I already get the service engine soon light. It goes on and off and after a week just stayed off and I have not brought it in to the dealer since. Now I can only get 21 mpg on the OBC. I am going to do a actual milage to tank calculation but I'm just bummed to see the numbers this low on the OBC.
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      09-13-2012, 12:22 PM   #31
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Just got done with my first full tank after having the recall service. Calculated 28.1 mpg for that tank, which is right in line with what I was getting prior to the recall.
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      09-13-2012, 02:59 PM   #32
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OK, going to throw a monkey wrench into all this. For me, it may be that the AC actually uses 15% of the fuel on the highway. It got cool here for a while and with the AC off, in some short distance samples, the MPG numbers seem to be closer to what I was getting before the recall. I expect to be taking a longer trip in about a month and that will confirm if this is the case. And if is the case, why is the AC using so much power? I believe it's suppose to be a variable output compressor. Maybe that logic has been messed up. I have noticed that after on the highway a while the air is extremely cold from the vents. Would save energy if the compressor was turned down a bit and the fan turned up a bit.
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      09-14-2012, 04:12 PM   #33
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I got it done yesteday. I have been googleing if anyone else seen this and ran into this forum...MPG's have fallen and something is missing from the engine compartment. They took something out off the side of the wheel well-drivers side. Now there are 3 big holes there where all the mud and snow can come into my engine compartment. Have these holes been there before?
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      09-14-2012, 04:31 PM   #34
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Quote:
Originally Posted by tetovari View Post
I got it done yesteday. I have been googleing if anyone else seen this and ran into this forum...MPG's have fallen and something is missing from the engine compartment. They took something out off the side of the wheel well-drivers side. Now there are 3 big holes there where all the mud and snow can come into my engine compartment. Have these holes been there before?
Those holes were there before the recall, we all have them.
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      09-16-2012, 12:01 AM   #35
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oh, thanks for reply. I just never noticed them before.
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      09-23-2012, 10:04 AM   #36
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FYI, I just received my car back after the second recall + oil change and my first two tanks have been 35mpg by true mile/gal calc (no JbD, but some spirited driving, avg speed: 36mph). Second was 32mpg with JBD (and heavier foot, avg speed: 32mph). My OBC seems to be further off though,but it will probably adjust over time.

Is it possible that some service centers may be screwing up the programming?
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      09-23-2012, 11:49 AM   #37
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Quote:
Originally Posted by FormerRotor View Post
FYI, I just received my car back after the second recall + oil change and my first two tanks have been 35mpg by true mile/gal calc (no JbD, but some spirited driving, avg speed: 36mph). Second was 32mpg with JBD (and heavier foot, avg speed: 32mph). My OBC seems to be further off though,but it will probably adjust over time.

Is it possible that some service centers may be screwing up the programming?
Removing the JBD or vice versa will cause a skewed result until your DME adapts.
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      09-23-2012, 05:31 PM   #38
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Quote:
Originally Posted by cssnms View Post
Removing the JBD or vice versa will cause a skewed result until your DME adapts.
Indeed. Usually I see a 5 mpg spread that narrows itself down to 2 over time. This time, its been a 10 mpg spread, but its probably über-confused considering that it went from JBD 100% to no JBD to recall W/out JBD to recall with JbD. She'll firgure it out eventually.
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      10-10-2012, 06:00 PM   #39
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10 % drop in mileage

I first noticed about a 10% drop after the first attempt at reprogramming. It took the dealer two tries.... I used to reliably get 34mph on flat highway at 70mph.. I am lucky to get above 30 now. City driving (without too much traffic) was giving 28-29 mpg but now it is 23-25 mpg. Repeated inquiries to the dealer service department have only netted "the engining is performing to spec's" response.
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      10-11-2012, 08:49 AM   #40
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Update: 3rd tank and I have new tires.. MPG essentially unchanged (+/- 1 mpg).
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      10-11-2012, 09:43 PM   #41
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Mine has stayed spot-on the same, at:
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      11-06-2012, 11:16 PM   #42
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Mine has been the same.
I just got a 2nd flash at the dealer last week.
See a thread I posted tonight.
NOT sure but it could be related, I believe it was released a month ago.
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      11-07-2012, 12:49 PM   #43
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I am happy to report that after several tanks of diesel my mpg's have nearly returned to the prior levels.
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      11-07-2012, 02:00 PM   #44
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I'm going in next week for the DME update and routine 'inspection'. Hoping for the same result.
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