Escaping some of the summer time heat with a trip to the mountains. 1658 miles total, 38.1 gallons gas, = 43.5mpg (43.3 indicated). Gas averaged around $2.50 gallon ($94.97) so about .05 cent/mile. No charging on trip and started with full battery that was slowly being depleted until I forgot to get back into HV mode after one stop on the first day (grrrr). Did lots of steep mountain grade driving in HV mode with little battery (2-4 bars) with little drama. Yes, you hear the ICE running higher than "usual". Gained as much as 15 miles EV from regen on the longest steep downhill leg. Usually drove in Sport mode with 4 chevrons regen set. Two long days driving (750 mile legs @ 11 hours each); got a little stiff towards the end of the day as one would expect but otherwise very comfortable for both driver and passenger. Fuel range was never an issue even out in very remote west Texas/east New Mexico. Most of those long legs were at steady 75-85 mph speeds till empty. Rinse, lather, repeat all day long. Got low fuel warning at around 30 miles and 2 bars left but drove another 30 miles after those fuel bars disappeared. This was the fill up: I even did 2-3 short stints at 100mph on the long straights in west Texas to put some distance between me and some hazardous drivers so I find the overall mileage of 43mpg to be incredibly impressive. There was no readily available public charging on the route nor destination and the Tesla trip planner couldn't calculate a route ("We're working on it."). Love this car!