Anecdotal. Chill mode seemed to reduce consumption appreciably, but not more than about 10%. I was a bit surprised it made that much difference.
- Autopilot, Range mode, SAS set to Lower when faster than 55 mph.
- Alternated 15-20 mile stretches between Chill mode and Normal.
- 70 to 75 mph. Moderate traffic, Autopilot had to adjust speed regularly. Cabin temperature set to about 68 degrees.
- 2017 S 100D
- Early December, temperature in low '40s, four adults plus full load of luggage.
- I-95 from Madison, CT SuperCharger through RI.
We got from Madison, CT to Wellfleet, MA on Cape Cod. Skipped the Sagamore SuperCharger that Tesla Nav had counted on.