Gasoline is about 6lbs per gallon. My fully loaded (except for EDC, CCB and Sunroof) F80 DCT with a full tank, ended up at 3574 lbs. 77.22 lbs for gas, means the delta might not be as large as you think.
I suspect that there are very few options that really add weight. EDC adds several feet of harnesses and sensors and the dampers are (slightly) heavier. The Driver's assistance likely adds a bunch of wiring for the cameras, etc.
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