Miles per gallon (MPG, or mpg) is a measure of fuel efficiency - the number of miles the car can run on one gallon of fuel. The unit is ambiguous because of the difference between U.S. fluid gallon (3,785.4 cm3) and the Imperial gallon (4,546.09 cm3). Fuel efficiency relates the efficiency of conversion to kinetic energy from energy contained in a carrier fuel, specifically in a transportation vehicle, such as an automobile. ... A mile is any of several units of distance, or, in physics terminology, of length. ... The gallon is a unit of volume used for measuring liquids (as well as dry matter). ... The Imperial units are an irregularly standardized system of units that have been used in the United Kingdom and its former colonies, including the United States and Commonwealth countries. ...
For the conversion factors, see the Fuel efficiency unit conversions. Fuel efficiency relates the efficiency of conversion to kinetic energy from energy contained in a carrier fuel, specifically in a transportation vehicle, such as an automobile. ...
The August fleet average was 60 person-miles pergallon for the fleet [1].
The performance goal is based on the average fuel efficiency of the motorpool’s new Prius (50 milespergallon) and the assumption of three occupants per trip.
In order to calculate gallons purchased off-campus, the AAA’s Daily Fuel Gauge Report website provided the average price pergallon for gas by month, which was divided by the total cost These totals were then divided by the total number of person-miles.
The number of passenger per car as reported by the ICC was not really the number per car as is explained in the next section.
So assuming 1/3 of a baggage car per train is like assuming that the typical passenger train that had baggage cars, used half of one baggage car to transport the luggage of the passengers.
Using the same methodology one can estimate the passenger-miles pergallon for steam engine trains powered by coal (and fuel oil) by using the fact that the heat value of one gallon of gasoline is about the same as the heat value of 9.5 pounds of coal (per US Bureau of Mines, 1950).
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