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Old 10-13-2012, 07:43 PM
mda185 mda185 is offline
Officially Welcomed to the 'Fest
Location: NJ
 
Join Date: Aug 2012
Posts: 432
Mein Auto: 95 525iT w/S52 5 spd swap
I am not sure you are right about Shell V Power and ethanol. I use it here in NJ and I am pretty sure it has ethanol. Fuel consumption will change with ethanol because it has lower energy content for a given volume. I believe the percentage of ethanol in our fuel has been creeping up that last few years but I have no hard data to back that up. I do remember reading that oil companies also do things for winter blends that tend to increase fuel consumption in this region of the USA. I have noticed in my 530i that with multiple short trips at low speeds (local driving), my mileage is 16-18 mpg. As soon as I mix in some highway or steady state 50 mph driving on two lane country roads, my mileage increases to 22-23 mpg average range. Pure highway driving is in the high 20's. Our cars do not do well with stop and go driving. I am sure it is down to their weight and how much energy it takes to accelerate from a stand still.
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