Christine and also Scott Gable are hybrid auto and different fuel experts who have actually brewed their own biodiesel and also traveled 125,000 miles on waste vegetable oil." data-inline-tooltip="true">Christine & Scott Gable

Christine and also Scott Gable room hybrid auto and alternative fuel experts who have brewed their own biodiesel and traveled 125,000 miles on waste vegetables oil.

You are watching: Energy in a gallon of gas


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In the most basic terms, petrol Gallon Equivalents are provided to identify the quantity of energy created by alternate fuels together they compare to the energy produced by one gallon of gasoline (114,100 BTUs). Utilizing fuel energy equivalents gives the user v a comparison device for gauging various fuels against a known consistent that has actually relative meaning.


The most common method for gauging fuel power comparisons of measure is the gasoline Gallon Equivalents, illustrated in the chart listed below which compares the BTU generated per unit of alternative fuel come the output of gasoline, measure it the end in a gallon equivalent.


Fuel TypeUnit that MeasureBTUs/UnitGallon Equivalent
Gasoline (regular)gallon114,1001.00 gallon
Diesel #2gallon129,5000.88 gallons
Biodiesel (B100)gallon118,3000.96 gallons
Biodiesel (B20)gallon127,2500.90 gallons
Compressed natural Gas (CNG)cubic foot900126.67 cu. Ft.
Liquid natural Gas (LNG)gallon75,0001.52 gallons
Propane (LPG)gallon84,3001.35 gallons
Ethanol (E100)gallon76,1001.50 gallons
Ethanol (E85)gallon81,8001.39 gallons
Methanol (M100)gallon56,8002.01 gallons
Methanol (M85)gallon65,4001.74 gallons
Electricitykilowatt hour (Kwh)3,40033.56 Kwhs

those a BTU?

As a basis for determining the energy content that a fuel, the is useful to understand specifically what a BTU (British thermal Unit) is. Scientifically, the British heat Unit is a quantifier the the lot of warmth (energy) required to progressive the temperature that 1 pound of water by 1 degree Fahrenheit. It usually boils under to being a traditional for the measure up of power.


Just as PSI (pounds every square inch) is a traditional for measure pressure, so too is a BTU a conventional for measuring power content. Once you have the BTU together a standard, it becomes much simpler to compare the effects different contents have on energy production. As portrayed in the graph above, girlfriend can also compare the output of electricity and also compressed gas to liquid gasoline in BTUs per unit.


additional Comparisons

In 2010 the united States ecological Protection agency introduced the Miles every Gallon of Gasoline-equivalent(MPGe) metric because that measuring electric power outputs for electric vehicles prefer the Nissan Leaf. As illustrated in the chart above, the EPA figured out each gallon of gasoline approximates to approximately 33.56 kilowatt-hours of power.


Using this metric the EPA has due to the fact that been may be to advice the fuel economy of all vehicles on the market. This label, which says the vehicle's approximated fuel efficiency, is required to be displayed on every light-duty vehicles right now in production. Each year the EPA release a perform of manufacturers and also their performance rating. If domestic or foreign manufacturers carry out not satisfy EPA standards, though, they will incur a tariff upon income or a hefty good for domestic sales.

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Due to Obama-era regulations introduced in 2014, even more, stringent requirements have been inserted on manufacturers to equalize their yearly carbon footprint — at least in state of brand-new cars on the market. This regulations call for that the merged average of all of the manufacturers' vehicles must exceed 33 miles per gallon (or its equivalent in BTU). That way for every high-emissions car that Chevrolet produces, it have to offset it with a Partial Zero-Emissions auto (PZEV). This plan has substantially reduced the emissions of domestic automobile manufacturing and usage due to the fact that its implementation.