If my car is 56% better on fuel than can I say this?

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A car that travels twice the distance on the same amount of fuel cannot claim to use fuel four times more efficiently; it is only twice as efficient. The discussion highlights that while the distance covered increases, factors like friction and wind resistance also double, affecting overall efficiency. The analogy to Ohm's law is used to illustrate that doubling one variable does not equate to quadrupling the output in this context. The consensus is that efficiency claims should be based on direct comparisons rather than assumptions. Therefore, the correct interpretation is that the car is only twice as fuel-efficient.
smokingwheels
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If my car goes twice the distance on the same amount of fuel, doing twice the distance the friction and wind resistance is double.

Can I say my engine uses fuel 4 times more efficiently?
Or is it only double?

My thinking behind it comes from Ohms law, if you double the voltage you get 4 times the power to the same load.
 
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It is only double. You are double-booking.
 
D H said:
It is only double. You are double-booking.

Ok thanks
 

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