Turbos and Oil Changes

[wwillson]

And it's not like you are running a terrible amount of power on the interstate either. Are you even boosting?

My 3.0L Duramax averages about 10 psi boost and EGTs of 950°F cruising down the interstate at 75MPH with no wind.

 

[Jetronic]

My 3.0L Duramax averages about 10 psi boost and EGTs of 950°F cruising down the interstate at 75MPH with no wind.

Diesels do that, but often it's done to lean out the mixture more. Any idea what the AFR is then? I'm guessing 25:1 or leaner?

My old diesel ran with boost everywhere aswell, except when performing a regen, than it ran 0 boost just cruising

 

[SHOZ]

Most modern turbos have passive cooling after the engine is off as coolant still convectively flows as it is cooling off/heat rising.

 

[Jetronic]

Most modern turbos have passive cooling after the engine is off as coolant still convectively flows as it is cooling off/heat rising.

except a minority of engines have coolant flowing through them at all, at least here. My new car doesn't

 

[wwillson]

Any idea what the AFR is then? I'm guessing 25:1 or leaner?

I will check.