Fuel is sold by volume, which is why volumetric fuel efficiency is desirable to the consumer

Fuel is sold by volume and fuel type; diesel is about 25% more expensive per gallon than regular gasoline where I am.

	▲	SECProto 3 days ago \| parent \| next [-]
		Correct - where I am it is cheaper most of the year, a bit more expensive in the winter.
	▲	andruby 3 days ago \| parent \| prev [-]
		And it is 10% cheaper than gasoline where I am (South-Africa)