Overheating while idling

[Samson]

Originally Posted by Lil bastard

After the slight warm-up, you want the engine revving higher so that oil is flowed to the top of the engine and lubes and cools the head, cams and valves. The oil pump is not at maximum pressure or flow at idle, nor is the coolant pump.

Exactly. The FerrariChat post mentions that after a certain pressure, thicker/colder fluid (oil) doesn't flow any more, which may well be true (I'm not big into fluid dynamics, sorry), but what is that point? I'd guess it would be above idle somewhere. Combine that with the other important stuff that needs to warm up, and we arrive back at the original conclusion to not let your car sit and "warm up".

And wait a second. The world isn't flat? Consider my mind blown.

[landrovered]

At the end of the day we may be arguing about 2-3 minutes difference between your 30 seconds and my warm up.

The thing I learned from the article is that pressure does not always equate to lubrication.