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Big "J"
11-20-2007, 10:08 AM
What are you all getting for City and HWY MPG in your X5? Any ideas how to improve it?

hcz22
11-20-2007, 11:34 AM
I'm getting a combined 21.3MPG (UK gallons) in my 4.8is

No idea how to improve it other than do a gas conversion. It lowers the MPG but the gas is WAY cheaper to buy.

I think it's good compared to my previous car a 4.7V8 Grand Cherokee the returned about 12-16MPG!

And I'm only getting 26MPG out of a 330CiA so 21 out of the X5 is fine in my book!

Big "J"
11-20-2007, 11:45 AM
That's pretty good for a V8!! I have the 3.0 I6. Getting about 15-18 in the city. Wonder if it should be better than that?

zee28
11-20-2007, 01:44 PM
I'm getting 17.8 in my 07 4.8is.

Starab
11-21-2007, 04:17 AM
I'm getting a combined 21.3MPG (UK gallons) in my 4.8is

I think it's good compared to my previous car a 4.7V8 Grand Cherokee the returned about 12-16MPG!

And I'm only getting 26MPG out of a 330CiA so 21 out of the X5 is fine in my book!


Euroope has good MPG with their autos - Do not Know why[ Maybe NO ETHANOL in gas there ? ]
Europe has more models within the same SERIES of BMW
Europe has more options to choose in their BMW (colors, options, accessories etc)

chonko
11-21-2007, 06:56 AM
Euroope has good MPG with their autos - Do not Know why[ Maybe NO ETHANOL in gas there ? ]
Europe has more models within the same SERIES of BMW
Europe has more options to choose in their BMW (colors, options, accessories etc)

Also worth remembering that 1UK gallon = 1.2 US gallon, hence a 21.3 mpg (uk)= 17.8 mpg (us)
With regards to octane rating, I think Europe tends to run a higher octane rating than the US.

Starab
11-21-2007, 07:18 AM
Also that 1UK gallon = 1.2 US gallon, hence a 21.3 mpg (uk)= 17.8 mpg (us)
Europe tends to run a higher octane rating than the US.

I did not know these before
Thanks

Big "J"
11-21-2007, 09:51 AM
I guess another question would be- what Octane level of gas are you putting in? Regular, Plus or Premium? Does this make that much of a difference?

Starab
11-21-2007, 10:56 AM
what Octane level of gas are you putting in? Regular, Plus or Premium? Does this make that much of a difference?

I put Top Tier Gasoline (mid grade 89) Usually Shell, BMW Brochure says 87 is OK[recommends 91 , does not specify /or say REQUIRED = 91 , as some other autos]

Trying to find Ethanol free Gasoline as Ethanol is :
MPG-KILLER by 3-5 mpg (does not burn fully and dilutes the gas),
absorbs moisture-water (not good for engine) ,
engine start problem in winter/cold (less energy efficient),
Raised the grocery prices ( produced from corn)
Have read reports that it has damaged some BMW cars-Big time-repair costs

Big "J"
11-21-2007, 11:07 AM
Wow!! Yeah.... we have ethanol here in the Dallas area. Didn't know it could create issues in the engine? Would any of you recommend any additives to put in with the gas say... octane boost or STP gas treatment type stuff?

Bvanw
11-21-2007, 12:17 PM
Our 2006 4.8is (stock everything) has a lifetime average of 18 (70% city) with 11,500 miles. I take a 80 round trip with her once in a while with 80% highway miles and see 21-22 running close to 70 mph.

Starab
11-21-2007, 01:49 PM
Wow!! Yeah.... we have ethanol here in the Dallas area. Didn't know it could create issues in the engine? Would any of you recommend any additives to put in with the gas say... octane boost or STP gas treatment type stuff?

Some BMW guy recommends Red line Complete fuel system cleaner/ Techron concentrate by Chevron in the gas tank every 3000-5000 miles. No idea how it works /helps.

Big "J"
11-21-2007, 02:14 PM
Thanks!! Y'all have a happy holiday!!!

OldHubbardRd
11-21-2007, 02:51 PM
I'm getting 21 MPG on highway. I'm getting aprox 14-17 city

emcman
11-21-2007, 04:57 PM
I am getting more like 15mpg but it is all stop and go. We have no self service here and once I got a tank of regular by mistake. The engine management just adjusted the timing and it ran fine. I expect there might be some power drop off if I was going uphill flat out or the like. I use prem though as the miles I put on it is low.

chonko
11-22-2007, 04:58 AM
I guess another question would be- what Octane level of gas are you putting in? Regular, Plus or Premium? Does this make that much of a difference?

It is highly recommended that you use Premium, and yes it does make much of a difference in terms of performance and consumption.
I remember trying to be cheap for a period of time and tried both the Regular and the Plus- the results were the same, poor gas mileage, and diminished performance.