I read the article and no where does it make a case for why a blockchain makes any sense in the application. I read a comment by a person claiming to be associated with the project saying that "blockchain enabled" makes sense because the payment are p2p but that doesn't make sense either. Blockchains are good for pretty much one thing: a distributed ledger that parties can trust to be immutable. I can confidently say…
I fill up my Jeep about once a week. At an average cost of $25 to fill over the course of 52 weeks, that's $1,300. Of course I don't have the added bonus of being able to charge from solar power, but at least that shows that the cost of electricity isn't prohibitive versus the cost of gasoline.
http://www.jeepforum.com/forum/f9/gas-tank-size-249444/
Of course, that whole discussion just throws a bunch of wrenches into the works; maybe you do have the 15 gallon tank on a older model (newer JKs have much larger tanks supposedly)? And apparently there's still more in the tank even once the light comes on (a few gallons reserve)?
I've never "buried the needle" on my Jeep yet, so I have no idea what size tank I have.