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this post was submitted on 02 Jun 2025
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chapotraphouse
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No anti-nautilism posts. See: Eco-fascism Primer
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I'm a strong believer of this too. It's a myth it uses more fuel. It helps with visibility. I have my headlights on and I've had other drivers or pedestrians tell me they're on and it's "of course they are it's safer!"
It used to be more valid when cars used standard incandescent (I think?) lightbulbs with much shorter lifespans than modern ones. It’s not a problem anymore
Yeah definitely when you had to swap bulbs out frequently it made more sense.
Is it a myth it uses more fuel or is it just negligible to the point of being immeasurable in practical terms?
Because the energy has to come from somewhere.
The car is making electricity when driving lights on or off. If the battery is full it's lost to waste.
If the battery is full the alternator doesn't output any significant current. It doesn't provide any extra load to the engine.