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BDifficulty 2/5

According to IDAE’s efficient-driving recommendation for petrol engines, how should you move off after starting when safe and permitted by the vehicle instructions?

Correct answer

Move off gently without warming the engine by idling for several minutes.

Move off without unnecessary idling, driving gently and avoiding heavy acceleration with a cold engine. IDAE recommends moving off immediately after starting a petrol engine. First complete necessary checks and ensure visibility and safety. This is not justified by a supposed compression chamber that always heats faster than a diesel’s.

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  • Idle for five minutes and then accelerate hard.

  • Move off gently without warming the engine by idling for several minutes.

  • Rev hard while stationary to warm the engine before moving off.

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