The gas/oil business sounds much like the aviation industry. How do you make a small fortune in aviation? Start out with a large fortune.
It is true that gas is way cheaper than other fluids (like bottled water, as you stated) but I guess the killer is that when you're thirsty, it costs you $2 to satisfy the thirst. When your car is thirsty, it costs $50+ to satisfy it. Funny that everyone thinks it would be great to have a car that ran on water but it would end up costing 4 times more to fill it! "My Porsche does not run on tap water"...
