how does fuel efficiency increase as fuel level decreases?

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There was a post on r/theydidthemath that asked how far a fuel tanker could go if is tank was connected to it’s fuel line, the op also said to keep in mind fuel efficiency increases as the fuel level gets lower, how does that work?

In: Chemistry

6 Answers

Anonymous 0 Comments

It’s not a direct correlation. The effect that they are referencing is the fact that weight plays a critical role in fuel efficiency, the less weight the farther you can go with a given amount of fuel/energy.

As fuel tanks empty, the vehicle becomes lighter and therefore is able to travel farther with the same amount of fuel input.

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