Gasoline contains 30,000 calories per gallon, enough to fuel a person for 20 days. Vegetable oil has the same amount of calories and can be converted for use in some cars. Human fuel efficiency decreases with speed and air resistance.
There are about 30,000 calories in a gallon (about 4 liters) of gasoline, which is enough to fuel a person for about 20 days, depending on their calorie intake. Humans burn energy quite efficiently. In fact, the average person traveling about 15 miles per hour (about 25 km/h) on a bicycle could get more than 900 miles per gallon (nearly 400 kpl) on a bicycle if they were able to fill up on gas.
Learn more about energy:
Vegetable oil actually contains about the same amount of calories as gasoline, so if the human body only needs fuel, not nutrients, then you could just fuel up with a few gallons of vegetable oil every month and finish eating by the month.
Chemically, gasoline and vegetable oil are quite similar. Both contain long chains of hydrogen and carbon, making it possible to convert vegetable oils for use in some cars.
Fuel efficiency in humans decreases rapidly with speed and relative air resistance. For example, in the bicycle example, going even 10 mph faster reduces miles per gallon by about two-thirds.
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