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X5 E70 (2007 - 2013)
E70 BMW X5 produced between 2007 and 2013. Discuss the E70 X5 with other BMW owners here.

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  #1  
Old 02-20-2014, 09:53 AM
ninja_zx11 ninja_zx11 is online now
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2009 E70 X5 35D Fuel economy

Hello friends, Just bought 35D last month and i am not getting good fuel ecomy as they say on the books.It has 76000 kms (48000 miles) on it and i drive always watching my mpg dial and always watch my foot.I drive 50-50 hwy and city with normal traffic.The best i am getting is 11.2 litres/100 km (21 MPG).It has a CPO warrany and brand new bridgestone RFT tires and has a 3rd row but not a sports package..

Is it normal fuel consumption or i should take it to the dealer.Please advice me.Thanks
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  #2  
Old 02-20-2014, 10:39 AM
blue dragon blue dragon is offline
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Normal, especially for this cold weather. I'm at 11.5 l/100km myself with mixed driving.
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  #3  
Old 02-20-2014, 10:42 AM
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serge1 serge1 is offline
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The ratings are 19mpg city, 26 highway.
With 50/50, you would theoretically get 22.5mpg.
But it is winter now..

How many miles do you travel on a full tank?
I usually get 430 at the time when warning comes in. My driving is 70-90% city though..

Last edited by serge1; 02-20-2014 at 10:44 AM.
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  #4  
Old 02-20-2014, 01:17 PM
ninja_zx11 ninja_zx11 is online now
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thanks blue dragon and serge1 for your inputs.I am in vancouver and temp here is 0 to +5 deg centigrades.So in winter,is it the winter formulated fuel or ambient temperature effects the economy?I cant understand how some people have claimed 24-25 mpg city.that's why i am thinking that my X5 is consuming more.

Also please suggest the best diesel ?i am filling at chevron all the times.
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  #5  
Old 02-20-2014, 03:57 PM
nedchiu nedchiu is offline
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Hello I am in Vancouver as well. I do almost 100% city driving and I get about 12.3 l/100 (650km $120), it is much better than my 2008 3.0si at 15.3l/100 (450km $115).
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  #6  
Old 02-20-2014, 07:04 PM
FredoinSF FredoinSF is offline
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You're probably getting normal mileage, city driving and stop & go really hurt the mileage. Based on my experience, 24-25MPG city is doable for short duration or under absolute optimum conditions, but I don't think it's sustainable.
Check my Fuelly mileage by clicking on X5 on my sig.
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  #7  
Old 02-20-2014, 08:34 PM
dzampi dzampi is offline
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Hello I am in Vancouver as well. I do 50/50% city/hwy driving and I get about 9.9l/km according to the car computer....I will get somewhere just above 700km when the light comes on....
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  #8  
Old 02-21-2014, 04:59 AM
smyles smyles is offline
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Why do you guys expect significantly worse mileage in winter? No A/C, colder & denser air, and it's not like diesels need a lot of warm up anyway...
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  #9  
Old 02-21-2014, 05:46 AM
dnaer dnaer is offline
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Fuel is mixed differently and does not contain as much energy as summer blend...at least in the North
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  #10  
Old 02-21-2014, 10:25 AM
howiedds howiedds is offline
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yeah combo of cold temps and winter mix fuel will give you worse MPG.
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  #11  
Old 02-21-2014, 01:08 PM
smyles smyles is offline
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Well, not that my area is famous for its winters, but this one has been rather cold and long, and yet my average MPG slightly improved compared to summer. I commute 100+ miles daily, so it's apples to apples.
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  #12  
Old 02-21-2014, 03:35 PM
howiedds howiedds is offline
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Quote:
Originally Posted by smyles View Post
Well, not that my area is famous for its winters, but this one has been rather cold and long, and yet my average MPG slightly improved compared to summer. I commute 100+ miles daily, so it's apples to apples.
you have good right foot control...lol

Basically this is what attributes to lower mpg in winter...

1. Winter diesel has less energy per gallon due to the winter blend. Winter diesel is effectively regular diesel fuel but with additives (and some suggest, a slightly different refining process) that help reduce clouding and gelling of the fuel making for a more carefree winter season once the weather gets cold. However this lowers the diesel's "Cetane" rating. A reduced Cetane rating reduces the ability of the fuel to auto-ignite, a process that eventually leads to lower fuel economy

2.Cold air is denser and harder to push out of the way, increasing aerodynamic drag. .

3.The air in your tires has contracted and you'll have to add more to compensate.
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  #13  
Old 02-21-2014, 11:40 PM
smyles smyles is offline
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How much less energy the winter fuel has? Is the difference more than what A/C consumes? Re extra drag from a denser air - that's negligent for the speeds we drive at, and again, turbo engines are more efficient with colder intake air.

#3 is usually addressed when we all get that TPMS error at first chilly morning.

Last edited by smyles; 02-21-2014 at 11:41 PM.
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  #14  
Old 02-22-2014, 05:37 AM
skiier3_9 skiier3_9 is offline
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I've been at about 22 as well and do pretty close to 50/50 city/highway the past few fill ups.
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  #15  
Old 02-22-2014, 05:56 AM
dnaer dnaer is offline
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I drive 90% highway (that's why my last 3 vehicles have been diesel) and am averaging 25.2 mpg. Averaged 31.7 on my 335D and around 19 mpg on the V10 TDI Touareg.....can't imagine going back to gas unless my driving habits change to more city bias
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  #16  
Old 02-22-2014, 07:59 AM
rhm rhm is offline
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I'm in Calgary getting 10.3 l/100 kms according to the display. Mostly in the city. I thought that wasn't great, but after reading this thread I guess I'm not doing too bad.
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  #17  
Old 02-22-2014, 11:36 AM
Talstar Talstar is offline
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I'm in Florida and 21mpg is what I usually get for city driving.
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  #18  
Old 02-22-2014, 12:10 PM
nedchiu nedchiu is offline
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Here in Vancouver

Here in Vancouver, it's completely stop and go throughout the day. I don't think I can possibly drive for more than 3-5 minutes without stopping at a light or stop sign. We don't have any highways between Vancouver and the next city. At 12.3 L/100km (19.1 mpg), I am more than happy. My diesel is new to me and I have not driven in the summer yet. If I get better mileage in warmer months, bonus.
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  #19  
Old 02-22-2014, 02:01 PM
blue dragon blue dragon is offline
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12.3 :o
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  #20  
Old 03-10-2014, 11:45 AM
ninja_zx11 ninja_zx11 is online now
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Hello all and would like to post update.2 weeks ago i felt the smell of exhaust fumes in the cabin while first starting it during cold morning.I checked it under the bonnet and was coming from the rear right hand side of the engine.First i was thinking of common egr problem.Took it to the dealer and they found that throttle valve was leaking and they changed it.After that no more fumes and economy went to 8.5l/100km (27.6MPG) from 11.2l/100km with 50-50 hwy city driving.I am not fully sure because now the weather has warmed up too (around 10-12 degrees centigrade and before was around -5 degrees).But it was same fill up.So same diesel but warmer weather.Not sure if its the throttle valve or warmer weather that fixed it.
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  #21  
Old 03-10-2014, 01:49 PM
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serge1 serge1 is offline
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Quote:
Originally Posted by ninja_zx11 View Post
Hello all and would like to post update.2 weeks ago i felt the smell of exhaust fumes in the cabin while first starting it during cold morning.I checked it under the bonnet and was coming from the rear right hand side of the engine.First i was thinking of common egr problem.Took it to the dealer and they found that throttle valve was leaking and they changed it.After that no more fumes and economy went to 8.5l/100km (27.6MPG) from 11.2l/100km with 50-50 hwy city driving.I am not fully sure because now the weather has warmed up too (around 10-12 degrees centigrade and before was around -5 degrees).But it was same fill up.So same diesel but warmer weather.Not sure if its the throttle valve or warmer weather that fixed it.
This is interesting...
Could you, please, elaborate what exactly was leaking, leaking to the outside I presume.

I do, too, get occasional smell when staring cold, and it is definitely not EGR.
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  #22  
Old 03-10-2014, 03:10 PM
ninja_zx11 ninja_zx11 is online now
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Originally Posted by serge1 View Post
This is interesting...
Could you, please, elaborate what exactly was leaking, leaking to the outside I presume.

I do, too, get occasional smell when staring cold, and it is definitely not EGR.
SA was saying that exhaust fumes were leaking from the throttle valve and it was evident as there was black soot around it.
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  #23  
Old 03-10-2014, 03:32 PM
lpcapital lpcapital is offline
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Quote:
Originally Posted by ninja_zx11 View Post
SA was saying that exhaust fumes were leaking from the throttle valve and it was evident as there was black soot around it.
I continue to be puzzled by continuing to refer to whatever it was changed as the "throttle valve" or "throttle position sensor" depending on the post. There is no throttle valve and no TPS other than the one in front of the EGR that has a role very different than a traditional throttle valve found in gasoline engine (and has a built in TPS). Diesel engines use fuel to regulate engine speed so they do not need a throttle.

Was the EGR throttle that was changed? Because it's not in the "rear right side of the engine". Assuming that by right side you refer to driver side (as it would be when looking at the engine from the front), in the rear there is the MAP sensor (manifold absolute pressure sensor). Otherwise back there there, mounted on the fuel rail, there is the fuel rail pressure regulating valve which could be remotely be associated to the equivalent of a throttle valve of a gasoline engine. But it sure wouldn't cause soot to leak...
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Last edited by lpcapital; 03-10-2014 at 03:40 PM.
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  #24  
Old 03-10-2014, 04:08 PM
ninja_zx11 ninja_zx11 is online now
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Quote:
Originally Posted by lpcapital View Post
I continue to be puzzled by continuing to refer to whatever it was changed as the "throttle valve" or "throttle position sensor" depending on the post. There is no throttle valve and no TPS other than the one in front of the EGR that has a role very different than a traditional throttle valve found in gasoline engine (and has a built in TPS). Diesel engines use fuel to regulate engine speed so they do not need a throttle.

Was the EGR throttle that was changed? Because it's not in the "rear right side of the engine". Assuming that by right side you refer to driver side (as it would be when looking at the engine from the front), in the rear there is the MAP sensor (manifold absolute pressure sensor). Otherwise back there there, mounted on the fuel rail, there is the fuel rail pressure regulating valve which could be remotely be associated to the equivalent of a throttle valve of a gasoline engine. But it sure wouldn't cause soot to leak...
I remember he was saying throttle valve assembly ( part of egr system).I personally didnt see soot but SA was saying that there was little black soot by the throttle valve assembly.It was hard for me to pin point the smell around the engine but i definitely felt the smell from the right side ( passenger side).
On the driver side i think i tried to stick my nose in there () but there was not enough room to check.So after the repair i could still feel very negligible smell from the right side in the engine bay but the shop foreman was saying that its normal for the fumes to escape from the waste gate actuator.But honestly i have no idea if its normal or not.Sometimes you have to trust them.But fumes in the cabin is fixed.

Last edited by ninja_zx11; 03-10-2014 at 04:11 PM.
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  #25  
Old 03-10-2014, 04:14 PM
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serge1 serge1 is offline
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Quote:
Originally Posted by ninja_zx11 View Post
SA was saying that exhaust fumes were leaking from the throttle valve and it was evident as there was black soot around it.
I wonder if the soot is what's on the picture (passenger side of the engine, can bee seen looking down


If yes, it seems to be by design. Stuff comes out of there ocasionally, seems like. Now, i dont know how often and if it is supposed to smell strongly.

See this TSB:

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