Mediocre Gas Mileage

BimmerToolRental · 04-14-2015, 10:32 PM

2011 335D 53K. Just purchased from CarMax with extended warranty. The car runs fine but it seems like a little bit of a pig off the line, although it will get up and go if you stab it. Secondly is my combined mileage with allot of highway is around 22.

Anything common on these besides below to check?

I have checked the following.
Thermostat is normal at 88C/190F
DPF pressure is reporting normal (BMWhat)

Thanks,
Kaine

WreckerX5d · 04-14-2015, 11:42 PM

Very horrible fuel mileage. I average 28-30 with mostly highway. Does it idle somewhat rough? That is about the right miles for the Carbon Build Up issue going around.

bvanlieu · 04-15-2015, 06:15 AM

If you are driving < 80 MPH a lot on HWY, you should be over 30 MPG.

70-75 cruising yields 35+.

If its very much slow down low then gets going, do you have a problem with the low RPM turbo (would think a code would be tossed but not sure if that triggers a MAP warning for low pressure). 400 ft-lbs is available pretty quickly then peters out at 4K.

CBU seems a next thing to check on the list if no obvious codes...

- b

Persian Whisperjet · 04-15-2015, 06:39 AM

Long trips under 80 with no a/c no wind no hills expect 38-40, although the time of year has something to do with fuel blend etc.

Mark M · 04-15-2015, 07:24 AM

Are you hand calculating mpg? These on board computers can be off. I know mine was until I edited the multiplication factors to assign corrections.

kbsilver · 04-15-2015, 08:48 AM

As others have said, sounds like CBU. Being a pig off the line may just be turbo lag. A clean engine under ideal conditions (warm but no AC, windows closed, level ground, highway driving, not exceeding 65-70 MPH) should yield over 40 MPG (I've achieved 42).

53K miles is exactly when I had the CBU treatment on my 2011 as well. Until it set an SES, the ONLY symptom was reduced MPG.

command_liner · 04-15-2015, 10:46 AM

This might seem harsh...

Start crying now. It will save you some time down the road. Your CarMax warranty is most likely useless.

melonbread · 04-15-2015, 10:51 AM

does all 335d have cbu issue at around 40k to 60k miles? far as warranty, i agree with op above... i've been shopping around for different warranties but not many will cover in a event of diesel related.

WreckerX5d · 04-15-2015, 11:57 AM

Quote:

Originally Posted by melonbread

does all 335d have cbu issue at around 40k to 60k miles? far as warranty, i agree with op above... i've been shopping around for different warranties but not many will cover in a event of diesel related.

The CPO warranty is known to cover CBU now, but only if you have a CEL. The average mileage I have been seeing on this board is about 40-60k. Mine happened at 73k miles.

melonbread · 04-15-2015, 12:05 PM

how much does CBU repair cost?

melonbread · 04-15-2015, 12:15 PM

Quote:

Originally Posted by Wrecker335d

The CPO warranty is known to cover CBU now, but only if you have a CEL. The average mileage I have been seeing on this board is about 40-60k. Mine happened at 73k miles.

btw... what's "CEL"?

Quasimodem · 04-15-2015, 12:19 PM

Quote:

Originally Posted by melonbread

btw... what's "CEL"?

Check Engine Light, same as SES--Service Engine Soon.

NC335d · 04-15-2015, 01:00 PM

Kaine,

Bimmer Performance just did a CBU cleaning on my car last week at 43k miles. I did it as a preventative measure, no CEL, the amount of gunk in there was quite impressive. You can get them to check the levels of CBU for you and see if they can trigger the codes for you to get your warranty to cover the cleaning.

kbsilver · 04-15-2015, 02:20 PM

Quote:

Originally Posted by melonbread

how much does CBU repair cost?

In the neighborhood of $1500 at an HONEST dealer. Dishonest dealer will try and get $3K+. It's not a repair, it's more of a cleaning.

It will not happen to all 335Ds, but will for most of them. Many more than once in a 200K mile lifetime. If you rarely take short trips and are typically driving at highway speeds and not around town, it may not happen to you. Of course this is presuming you had the car from new.

melonbread · 04-15-2015, 02:55 PM

Quote:

Originally Posted by kbsilver

In the neighborhood of $1500 at an HONEST dealer. Dishonest dealer will try and get $3K+. It's not a repair, it's more of a cleaning.

It will not happen to all 335Ds, but will for most of them. Many more than once in a 200K mile lifetime. If you rarely take short trips and are typically driving at highway speeds and not around town, it may not happen to you. Of course this is presuming you had the car from new.

good information kbsilver! i wonder what is the highest mileage on 335d from this forum...

WreckerX5d · 04-15-2015, 03:02 PM

Quote:

Originally Posted by melonbread

good information kbsilver! i wonder what is the highest mileage on 335d from this forum...

There's a thread floating around somewhere. I believe only a few are past the 100k mark, and me being pretty close to that.

melonbread · 04-15-2015, 03:12 PM

Quote:

Originally Posted by PINeely

Agreed, I have DD'd mine for 240,000 miles and still do.

other_evolved · 04-16-2015, 10:21 AM

I've had less than stellar MPG, as well, as one can see in my sig....although, most of my driving has been city.

AzureHaze · 04-16-2015, 10:51 AM

Quote:

Originally Posted by command_liner

Your CarMax warranty is most likely useless.

OP will need to throw codes for CarMax to foot the CBU cleaning bill but their warranty is far from useless.

Quote:

Originally Posted by Wrecker335d

The CPO warranty is known to cover CBU now, but only if you have a CEL.

+1. Just got mine done last week and I only had to pay a $50 deductible.

Now I need to have a little talk with Offset Motorwerks and see why I had to get another CBU cleaning from the stealership when they already did one for me no less than two months ago!

Quasimodem · 04-16-2015, 11:13 AM

Quote:

Originally Posted by AzureHaze

OP will need to throw codes for CarMax to foot the CBU cleaning bill but their warranty is far from useless.

+1. Just got mine done last week and I only had to pay a $50 deductible.

Now I need to have a little talk with Offset Motorwerks and see why I had to get another CBU cleaning from the stealership when they already did one for me no less than two months ago!

What dealership did the cleaning and how much did they charge? Did the symptoms go away?

AzureHaze · 04-16-2015, 06:05 PM

Quote:

Originally Posted by Quasimodem

What dealership did the cleaning and how much did they charge? Did the symptoms go away?

Century West BMW in Hollywood. Again, they only charged me the $50 deductible since my extended (non-maintenance) warranty covers it now apparently. I got a strange toasty odor in the first mile but went away. I also got a slight vibration during idle and some shaking during acceleration from a stop but started to go away the more I drove it.

B16 · 04-16-2015, 07:22 PM

Quote:

Originally Posted by AzureHaze

Century West BMW in Hollywood. Again, they only charged me the $50 deductible since my extended (non-maintenance) warranty covers it now apparently. I got a strange toasty odor in the first mile but went away. I also got a slight vibration during idle and some shaking during acceleration from a stop but started to go away the more I drove it.

Was your CEL on when you brought it in?

I'm also averaging around 25mpg (hand calc) with mostly highway driving. Albeit most of that highway driving can be stop and go. I have a 2011 335d CPO with 53,000 miles on it; no CEL.

04-14-2015, 10:32 PM	#1
BimmerToolRental Wannabe Mechanic 8 Rep 54 Posts Drives: 2011 E90 335D Join Date: Apr 2015 Location: Raleigh, NC iTrader: (0)	Mediocre Gas Mileage 2011 335D 53K. Just purchased from CarMax with extended warranty. The car runs fine but it seems like a little bit of a pig off the line, although it will get up and go if you stab it. Secondly is my combined mileage with allot of highway is around 22. Anything common on these besides below to check? I have checked the following. Thermostat is normal at 88C/190F DPF pressure is reporting normal (BMWhat) Thanks, Kaine
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04-14-2015, 11:42 PM	#2
WreckerX5d Warrant Officer 377 Rep 1,340 Posts Drives: Deezul Join Date: Oct 2010 Location: Long Island, NY iTrader: (4)	Very horrible fuel mileage. I average 28-30 with mostly highway. Does it idle somewhat rough? That is about the right miles for the Carbon Build Up issue going around. __________________ Deleted, ATM I/C and tuned by B.R.R.
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04-15-2015, 06:15 AM	#3
bvanlieu Second Lieutenant 59 Rep 268 Posts Drives: Alpine 335d Join Date: Nov 2013 Location: PA iTrader: (0)	If you are driving < 80 MPH a lot on HWY, you should be over 30 MPG. 70-75 cruising yields 35+. If its very much slow down low then gets going, do you have a problem with the low RPM turbo (would think a code would be tossed but not sure if that triggers a MAP warning for low pressure). 400 ft-lbs is available pretty quickly then peters out at 4K. CBU seems a next thing to check on the list if no obvious codes... - b
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04-15-2015, 06:39 AM	#4
Persian Whisperjet Kind of a Big Deal 171 Rep 857 Posts Drives: 2011 335d Join Date: Dec 2012 Location: Washington, D.C. iTrader: (0)	Long trips under 80 with no a/c no wind no hills expect 38-40, although the time of year has something to do with fuel blend etc. __________________
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04-15-2015, 07:24 AM	#5
Mark M Major 244 Rep 1,294 Posts Drives: E30M3 E83X3 E90335D Join Date: Aug 2007 Location: Lancaster, PA iTrader: (0)	Are you hand calculating mpg? These on board computers can be off. I know mine was until I edited the multiplication factors to assign corrections. __________________
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04-15-2015, 08:48 AM	#6
kbsilver Captain 143 Rep 631 Posts Drives: 340GT & '22 eDrive40 Join Date: Jan 2012 Location: North Jersey iTrader: (0)	As others have said, sounds like CBU. Being a pig off the line may just be turbo lag. A clean engine under ideal conditions (warm but no AC, windows closed, level ground, highway driving, not exceeding 65-70 MPH) should yield over 40 MPG (I've achieved 42). 53K miles is exactly when I had the CBU treatment on my 2011 as well. Until it set an SES, the ONLY symptom was reduced MPG.
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04-15-2015, 10:46 AM	#7
command_liner Private 20 Rep 88 Posts Drives: 2009 335d Join Date: Feb 2015 Location: United States iTrader: (0) Garage List 2018 Chevy Cruze Di ... [0.00] 2016 Chevy Cruze [0.00] 2018 Kubota Closed ... [0.00] 2002 Saturn LW200 [0.00] 2002 Saturn LW200 [0.00] 1978 MotoGuzzi Lema ... [0.00] 1970 BMW R75/5 [0.00] 1990 Suzuki VX800 [0.00] 1999 KTM LC4 [0.00] 1993 Saturn SL2 [0.00] 1978 Yanmar 186D [0.00] 1988 Honda HawkGT [0.00] 1970 Chrysler Newport [0.00] 2000 Honda Recon [0.00] 2000 Honda Recon [0.00] 1964 Chevy Chevelle ... [0.00] 2004.5 Chevy Silverado [0.00] 2009 335D [0.00]	This might seem harsh... Start crying now. It will save you some time down the road. Your CarMax warranty is most likely useless.
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04-15-2015, 10:51 AM	#8
melonbread Private First Class 26 Rep 175 Posts Drives: Honda Join Date: Apr 2015 Location: Austin, TX iTrader: (0)	does all 335d have cbu issue at around 40k to 60k miles? far as warranty, i agree with op above... i've been shopping around for different warranties but not many will cover in a event of diesel related.
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04-15-2015, 12:05 PM	#10
melonbread Private First Class 26 Rep 175 Posts Drives: Honda Join Date: Apr 2015 Location: Austin, TX iTrader: (0)	how much does CBU repair cost?
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04-15-2015, 01:00 PM	#13
NC335d Second Lieutenant 106 Rep 289 Posts Drives: 2011 335d Join Date: Sep 2014 Location: Raleigh, NC iTrader: (0) Garage List 2017 Audi Q7 [0.00] 2011 BMW 335d [0.00] 2006 Nissan Titan SE [0.00] 2008 MB CLS550 [0.00] 2012 BMW X5 SAV [0.00]	Kaine, Bimmer Performance just did a CBU cleaning on my car last week at 43k miles. I did it as a preventative measure, no CEL, the amount of gunk in there was quite impressive. You can get them to check the levels of CBU for you and see if they can trigger the codes for you to get your warranty to cover the cleaning.
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04-16-2015, 10:21 AM	#18
other_evolved Lieutenant Colonel 2073 Rep 1,894 Posts Drives: 2015 Chevrolet SS Join Date: Oct 2012 Location: Saint Louis iTrader: (0)	I've had less than stellar MPG, as well, as one can see in my sig....although, most of my driving has been city. __________________ Present 2015 Chevrolet SS 2014 Jeep Cherokee Trailhawk V6
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