Daytime running lights

X5plug-in · 04-29-2011, 01:43 PM

These look magnificent on the X3 and much less "fairground" than other manufacturer designs. I understand they are LEDs that come with my xenon option. Does anyone know the wattage / comsumption of these lights and the effect of use on mpg (%?). Having driven in even the sunniest countries where these are a legal requirement they really do enhance situational awareness of other drivers and pedestrians, so would like to leave them on all year.

lateshow · 04-29-2011, 02:09 PM

I'm only taking an educated guess here, but I would say the effect would be less than negligable. If you take mpg to that extreme, you should also consider the effects of driving with the radio on or with the navigation screen continuosly lit. Once your engine is running, the only thing that you can do with switches in your car to effect mpg (aside from driving in sport or sport +) is to drive with the AC on, and there are plenty of studies out there to show that it's better to do that than drive over 50 mph with the windows open thus creating more drag.

04-29-2011, 01:43 PM	#1
X5plug-in Lieutenant 73 Rep 532 Posts Drives: BMW Join Date: Jan 2011 Location: UK iTrader: (0)	Daytime running lights These look magnificent on the X3 and much less "fairground" than other manufacturer designs. I understand they are LEDs that come with my xenon option. Does anyone know the wattage / comsumption of these lights and the effect of use on mpg (%?). Having driven in even the sunniest countries where these are a legal requirement they really do enhance situational awareness of other drivers and pedestrians, so would like to leave them on all year.
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04-29-2011, 02:09 PM	#2
lateshow Private First Class 27 Rep 138 Posts Drives: 2011 BMW X3 35i Space Gray Join Date: Mar 2011 Location: Chicago, IL iTrader: (0) Garage List 2011 BMW X3 [0.00]	I'm only taking an educated guess here, but I would say the effect would be less than negligable. If you take mpg to that extreme, you should also consider the effects of driving with the radio on or with the navigation screen continuosly lit. Once your engine is running, the only thing that you can do with switches in your car to effect mpg (aside from driving in sport or sport +) is to drive with the AC on, and there are plenty of studies out there to show that it's better to do that than drive over 50 mph with the windows open thus creating more drag.
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