idling to cool the turbo

[dr-wall]

Hi, bought a 2010 new. Love the car, it's power, and handling. Goes through the snow easily. Safe for the wife and kid.
I was watching Motoring TV's mechanic spot and he was saying that all turbo'd cars should idle for at least 1 minute before shutting down. I thought coking of the oil on the turbo was a thing from the 80's not now?
Do our cars have anything to cool down the turbo after shut down? Should we idle for a minute?
I change my oil religiously and have changed to synthetic. My wife mostly drives the car to and from work. It is our family vacation car for the highway.
Any thoughts?

Thanks,
Walter

 

[Sleeper4SHO]

thought that was a thing of the past as well...i'll be watching for responses as well here

 

[rubydist]

well designed modern turbo design provides for no oil pooling in the turbo and for natural convective flow of the oil even after shutdown, so it is much less of an issue. synthetic and semi-synthetic oils are also much less prone to the coking issue, so it is less of an issue.

that does not mean it is not an issue, and good practice is to let it cool for a bit, particularly if you have been engaging in "spirited" driving on your way to the destination.

 

[SHOCH]

I don't have a Turbo SHO, I do have the Subie Turbo. As a rule for 30 years of driving I NEVER beat on my car, turbo or not when I know I'll be stopping soon. Cept track days and there's a cool down lap, which I try not to touch the brakes also.

 

[Off Road SHO]

In the olden days when turbos only used engine oil to lubricate and cool the center bearing, the oil had a lot to do and would often boil when the flow would shut off. Almost all of the new turbos today come with center section that is cooled by engine coolant so the "coking" is not much of a problem now.

But like SHOCH said above, you shouldn't be beating on the engine right before you shut it off anyway.

Tom