realtyman

My guess is that the more you drive it, the harder you drive it (happend to me ). Mileage does seem a little low, however. I'd try manual calculations and see if that works.

EBMCS03

Are you using DS a lot more than before? Before as in before break in. I know you like to play with the "Manual Mode" Shifting yourself rather than letting the car shift for you. Holding the RPM up there takes up more gas... I know you know that...


And... you said you getting 285 miles out of a tank dividing that by 18.5 gallons??... you actually filled up 18.5 gallons? that cant be what shows up at the pump meter... isnt that MAX capacity of an E60?

More than likly you filled up at most 17 gallons... usually at 16 your low gas warning would come on already and do you really always drive the car that low before getting gas?

Sorry dont mean to doubt you but just trying to help you diagnoise your problem to see if there really is a problem.

if its 285 and you're filling up 15 gallons thats 19mpg... which is barely at the minimum of what the car is rated for city and you do cruise the highway right? Meaning staying at pace using the gas pedel as little as possible to sustain a certain speed... not flogging it each time to pass someone or in stop and go orange county traffic.

Hormazd

By gas tracking meter do you mean in the iDrive? If so, the MPG computations are generally not very good. I assume you have also done it the old fashioned way: filling up, reseting your trip odometer, driving to your next fill up and dividing miles by number of gallons needed at next fill up. I have found this is still the best method and that the BMW onboard computer is not very good. If this is how your doing it and you have seen this kind of drop in mpg, I'd say you are having some issue with the car. Don't know what, software, tuning of some sort, but seeing this kind of drop, assuming your driving style is not more aggressive (using DS etc), seems to be a problem. Don't what to tell you about your dealer's reaction, but keep after them.

The "gas tracking switch" on the dash is just resetting the trip odometer. Resetting this will not impact the estimated miles till empty, either on the dash or in the iDrive. I am not surprised to see the estimated miles to empty drop since delivery as it is computation based on recent avg. MPG. When you took delivery, the avg MPG driving off the boat and around the dealers lot was very high (assuming you bought the car without it having been test driven by others). As you drove the car around town, likely more aggressively than it had ever been, the estimate till empty will drop.
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Thank you Kscarrol, thats what I am trying to tell the silly bear. Once again:

1) by pushing the button on the dash, you are simply reseting the odometer. It has no effect whatsoever on your miles to empty number.
2) Reset the Fuel consumption in I-Drive. Go the the screen below, scroll to fuel consumption and push down to reset.

3)Finally, as someone mentioned, your calculations are incorrect if you are assuming you are pumping 18.5 gallons. Take your actual mileage from the odo and divide it by the gallons you actually pump. Thats your MPG. If you follow the instructions in 2) it will match or be be damn close.
4) RTFM

SillyBear

The onboard gas status shown that I only have 15 miles before the tank completely empty. The computer saying it has only 15 miles in range and using the reserve fuel. So each time I refill, I pump it to the max. I don't remember how many gallons. But I expect to be at least 17-18.5 gallon.
I have been driving as normal "just the D drive, not using the DS or manual gear.
I have been tracking my total miles each time I reset the clear miles switch on the dash board. Not using the I-drive computer info at all.
Your input greatly appreciates

SillyBear

I will try the other method you guy has show me in the I -drive.

Hormazd

OK. I still don't think you have a lemon. You can take it to the dealer if you are concerned, but I do think 16mpg in OC traffic is OK. This weekend see if you can go through a tank while crusing in top gear. Check your results and please pay attention to how much you are pumping. the difference between 16.5 and 18.5 gals is significant if you want to complain about mpg.

EBMCS03

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