Turbo question

[Mark 5492]

We have a 2026 ST with a 3 liter twin turbo and I was told by a friend that I should let it idle before I shut it off to cool the turbo when on long trips on the highway is that true?

 

[Combatvet]

I've heard the same thing, but I think it could be caca. How long would you have to sit idling for temperatures to actually decrease? I think it's a good idea and I do it, but its likely as effective, but placebo type effect is suspected.