Do I need to let the engine idle after a long journey?

I have a Kia Rio that has a turbocharged engine. I was always told that after a long journey you must keep the engine running for a minute or two (in order to allow the turbo to cool down). Is this still the case?
It used to be good practice to leave a turbo engine running on idle for few minutes after hard use to let its lubricant cool down – could burn otherwise, shortening the life of the bearings. Most modern turbos' engine management systems will cool the turbo with a fan if it's needed, irrespective of whether you leave the car running or not. I suspect this'll be true of the Kia, but it's worth asking an engineer at the dealership just to be sure.
Answered by Russell Campbell on

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