In my 55 years of driving I've run out of gas at least half a dozen times, and my memory doesn't seem to be getting sharper in my seventies. So, let's say I've had my dream car for a year, now, and pretty much forgotten about ever having to put gas in.
One day I take off for my favorite place in the world – Yosemite. The battery is full, and I've topped off the gas tank. I take the Big Oak Flat Road, Highway 108 and 120. Going up Priest Grade at full speed is exhilarating, if a bit costly. (It's a 1400 ft. climb in 5 miles on the new road, only 2 miles on the old road, but that is very slow.) I arrive safely at Crane Flat, 6159 feet elevation and 185 miles from home, then plunge down the 17 mile hill to Yosemite Valley at 4000 feet, regen pumping mightily. After spending some time in the Valley, I drive up to Glacier Point, at 7200 feet, and back to the valley, a 60 mile round trip. I've almost made it back up to Crane Flat when ... OOPS! The gas tank is dry.
There is a gas station at Crane Flat, if I could only get there. Is there some way I could draw on that 30% reserve in the battery on an emergency basis?
I might be able to get the car turned around somehow, though it would be tricky on the narrow, twisty, mountain road, and coast back down to Yosemite Valley, but there is no gas station there, even if I could.
Highway 140 follows down the Merced river from Yosemite Valley, and I am almost positive I could negotiate its occasional slight rises on regen juice, but the first gas station in that direction is in Mariposa, 45 miles from where I am. And the hooker is that the highway, after dropping to 1500 feet along the river, climbs 1500 feet over a pass before it drops into Mariposa.
Is there any hope for me in either direction? Or am I doomed to a very expensive tow truck call?