[No one]

Originally Posted by baron95

I can't believe people are still repeating the old wives' tale about idling the car to let the turbos cool before shutdown. Are they deaf? Don't they hear the fan and pump going after shutdown on modern cars? My M2 does it plenty loud. My Jeep does it plenty loud.

No, I don't. I park meticulously and it always has the time to cool naturally.

[KevinGS]

Originally Posted by Redd

Here's proof that you should warm up your car.

Top pic are my rod bearings at 90k kms shortly after I purchased it. The car was in generally rough shape and it was obvious the PO had not taken care of it.

Bottom pic are my rod bearings when they were replaced earlier this May 2026 after 80k kms / 10.years of use. The main difference - I always warmed up 1 min from cold start, at least 15-20 seconds from warm start, and I maintained below 3k rpms until oil temps reached 85C.

So yes, warm up your cars.

I have a 2013 M3 with the S65, an engine with known rod bearing issues. And I rarely warm up my car.

And I drive my M3 year round, from 105 degree summer days to 0 degree winter nights. Occasionally in the winter, I warm it up for a few minutes if I need the windows defrosted. Otherwise, I just get in and drive off, even when it's 5 degrees outside. The warm up time is as long as it takes for me to buckle my belt, and queue the song I want to listen to.

My car has 160,000 miles, with its original rod bearings, running just fine.

Having said that, I keep the RPMs pretty low until the oil temperature rises to a suitable point, which could take a while on a cold winter day. Other than that, I just get in and drive off, every time.

So, maybe, your rod bearings looked like that for a different reason.

Plus, I'm fortunate to also have a twin turbo G82 M4, and if I'm ready to turn the engine off right after a super aggressive drive with lots of near-redline shifts, I will occasionally let the car engine run for a few minutes, out of sheer habit. But when I don't, and I just the turn car off right after an aggressive run, the car fans stay on for a while doing their thing. Modern turbos have all those computerized fans for a reason.

Oh, and my M4 has 120,000 miles. Yeah, I drive my cars.

[BruinMan]

What BMW generally recommends:

* Start the engine
* Wait about 10–30 seconds for oil circulation
* Drive gently until the engine warms up

The fastest and healthiest way to warm the engine, transmission, and differential is actually light driving — not extended idling.

Really cold freezing morning - 30 seconds to about 1 minute.

After hard driving or highway pulls, give the engine about 30–60 seconds of easy driving or light idle before shutting it off. That helps reduce heat stress on the turbochargers.

[baron95]

Originally Posted by MJBO

Everything in both photos looks shagged.

Shhhh...don't ruin his "proof".

[baron95]

Originally Posted by BruinMan

What BMW generally recommends:

* Start the engine
* Wait about 10–30 seconds for oil circulation
* Drive gently until the engine warms up

The fastest and healthiest way to warm the engine, transmission, and differential is actually light driving — not extended idling.

Really cold freezing morning - 30 seconds to about 1 minute.

After hard driving or highway pulls, give the engine about 30–60 seconds of easy driving or light idle before shutting it off. That helps reduce heat stress on the turbochargers.

There is a section on BMW manuals for "Highway Pulls"?

A) Highway Pulls, whatever that means is not hard driving.
B) Unless your garage is on the highway, getting off the highway after the so-called highway pulls would be plenty of cool down time.

Do people have any concept of what hard driving actually is? On a typical 30 min track session, I'm at WOT ~40%-50% of the time, and at or above ~5,000 RPM nearly 100% of the time, and the M2 is like "are we just warming up or what?"

[T.R.S.]

Originally Posted by Redd

Here's proof that you should warm up your car.

Top pic are my rod bearings at 90k kms shortly after I purchased it. The car was in generally rough shape and it was obvious the PO had not taken care of it.

Bottom pic are my rod bearings when they were replaced earlier this May 2026 after 80k kms / 10.years of use. The main difference - I always warmed up 1 min from cold start, at least 15-20 seconds from warm start, and I maintained below 3k rpms until oil temps reached 85C.

So yes, warm up your cars.

That's not "proof" of anything.