Comparing gasoline to beverage pricing is not realistic. A good portion of the cost in beverages is the packaging. Imagine if every gallon of gasoline was sold in a plastic 2-1/2 gallon container like you use for your lawnmower? Then what would gasoline cost to sell & distribute (no more moving it in tanker trucks).
Packaging is some of the cost, but most of it is the cost of marketing, R&D (esp for medicines), and making a packaging size choice that makes the product viable. Imagine buying Nyquil by the gallon ... first, it would expire before you used it all, and it would be inconvenient, probably slopping a bunch around when you tried to pour out a dose, and it would run Vick’s out of business, because people would only buy their product once a decade. But it would be a lot cheaper per gallon than what you pay now.
Other than the fact that all are fluids, these items have nothing in common. As long as the comparison is being made, someone should factor in the cost of any resulting mechanical damage and cost of draining the fuel system if you filled your car's fuel tank with any these other items. They are not interchangeable goods, so what's the point of comparing their prices.