Multiple choice general knowledge science & technology

You’re waiting for your friend to come out of the dairy. After how long would it be more efficient to turn your engine off then restart it, rather than continuing to idle?

  1. less than 30 seconds

  2. 30 seconds to 1 minute

  3. 2 minutes

  4. 5 – 7 minutes
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Modern engines consume more fuel idling beyond 30-60 seconds than they require to restart. If you're waiting longer than this threshold, turning off the engine is more fuel-efficient and produces fewer emissions than continued idling.

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