After driving let engine run to cool turbo

[j.o.y.ride]

There is no way any modern engine in a passenger vehicle needs to be idled for 10-15 minutes to properly cool.

Maybe if you're out street racing or towing heavy loads you want it to settle a bit, but a standard practice of 10-15 minutes of idling? Not a chance.

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[Pwntiac]

+1 never shut the truck off ‘immediately’ after running it hard. I like what the owners manual posted earlier states

if you’re just commuting to work (empty) then don’t worry about it. However if you’re towing or running in the mountains, then yeah give her a couple minutes

 

[dcmdon]

Pyrometer measures the temp on the exhaust side either pre or post turbo has nothing to do with the intake manifold. I ran a modified Dodge with a 5.9 for a while, even after running hard 2 or 3 minutes tops and it was as cool as it was going to get and it was only oil cooled.

Correct. The issue was (solved with watercooled turbo bearing housings) that the heat from the very very hot exhaust turbine blades would conduct to the common shaft where the bearings are and coke the oil, reducing oil flow to the bearings.

Intake temps are irrelevant.

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