I have some raw data from my jetta TDi. The TDii has day time running lights, but I have the european switch, which allows me to turn them of, but it then turns on the parking lights. There is no switch setting where I can turn all the lights off.
Noticed the following while idling at a drive thru window.
headlights/tail lights/markers on =.08GPH
tail/lights/markers=.07 GPH
Daytime running lights/ no tail or markers=.07 GPH
As you can see, this was a highly scientific and controlled study....
