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

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SUMMARY

The discussion centers on the efficiency of a car's fuel consumption when it travels twice the distance on the same amount of fuel. Participants clarify that while the car may seem to use fuel 4 times more efficiently, the actual efficiency gain is only double due to increased friction and wind resistance. The analogy to Ohm's Law is used to illustrate that doubling one factor does not equate to quadrupling the overall efficiency. The consensus is that the correct interpretation is that the engine uses fuel twice as efficiently, not four times.

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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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