MPG variations

[peakpro]

I am seeing variations in my MPG each time I fill up my 05 3.0i. I can get 15+ mpg one time and less than 12 the next.

I know these figures are accurate because my gas gauge is broken and I must keep an eye on my mileage each time I fill up. (I have been in once to BMW for service with no results)

Is this just a consequence of winter gas.

(Tire pressures are OK.)

thanks

[JCL]

It isn't winter fuel IMO, because all the stations will be running similar fuel blends.

The single biggest variable in MPG is the driver. 20% variation is easily done by most drivers, alternating between a heavy right foot, and driving easily.

If you are driving consistently, I would ask whether you always fill up at the same station. Different pumps will click off at different points (unless you top off each time yourself).

[peakpro]

i don't think my driving habits have changed at all......the majority of my driving is local...


and I go to the same station each time....


weird