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AMDifficulty 1/5

In the same vehicle under comparable conditions, can travelling at high speed increase fuel use per kilometre?

Correct answer

Yes, because of greater aerodynamic resistance and other factors.

Yes. At high speed aerodynamic resistance increases and fuel use per kilometre generally rises. This does not mean every increase from a very low speed always raises consumption: gear, engine speed, gradient and other conditions matter. Continuous acceleration is not needed to maintain constant speed; drive smoothly at an appropriate speed.

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All options

  • No; speed never affects consumption.

  • Yes, because of greater aerodynamic resistance and other factors.

  • Fuel use always decreases the higher the speed.

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