[MisterSkiMask]

Originally Posted by BrianMN

Whenever starting an engine in 0-30*F, every vehicle I've owned has had 50-60psi during COLD idle... of course it goes down to 20psi once warm.

Well, it is harder for the oil pump to move a cold thick "liquid" than a warm thin liquid. Just because the oil pump is pushing hard doesn't mean oil is getting where it needs to be in a really cold engine.

[turb0mik3]

Don't touch it.

[alextremo]

Originally Posted by nomercy

I just want to know why it is so important to warm up the engine, would have thought it to be beter to let it cool down..?
Looks like I was way worng, why would it be so important to warm it up!
Great thread!!!

Warming up and cooling down are both important.

Viscosity of engine oil changes with temperature so it will do its job better once it gets to normal operating temps. If you rev your engine high or put excessive load when cold you are working your pistons/cylinders (and turbochargers) hard with thicker, less lubricant oil. Not good if you’re trying to prevent wear. Seems like there is some question about how best to achieve this; warm up by idling or driving gingerly straight away. Personally, I start the car and wait for the RPM to drop from ~1k to ~600 then drive it easy (don’t rev over 2.5-3k rpm) until oil temp hits 190.

Cooling down a turbocharged engine prevents coking of the oil. This happens when the oil is overheated by the turbochargers and it doesn’t have a chance to cycle through the rest of the system to return back to normal temp. Our cars have an electric pump that continues to circulate water to cool hot oil after you shut the car off to prevent this, but it’s just good practice to not be at max boost within a few minutes of shutting the car off.

[StatenEye]

3rd party warranty.. like 4k.

[Alpina_B3_Lux]

Originally Posted by alextremo

Our cars have an electric pump that continues to circulate hot oil after you shut the car off to prevent this, but it’s just good practice to not be at max boost within a few minutes of shutting the car off.

Err, no we don't...it's the water pump that continues running even after the engine has been shut off, not the oil pump. This indirectly also cools down the oil, of course.

Alpina_B3_Lux

[alextremo]

Originally Posted by Alpina_B3_Lux

Err, no we don't...it's the water pump that continues running even after the engine has been shut off, not the oil pump. This indirectly also cools down the oil, of course.

Alpina_B3_Lux

Oops! I'm chalking that up to being hungover from yesterday

Thanks for the correction, updated post.

[Alpina_B3_Lux]

Originally Posted by alextremo

Oops! I'm chalking that up to being hungover from yesterday

Thanks for the correction, updated post.

It's a very useful thread you've made here.

Maybe one could also think of adding (in the modifications list) the possibility of using an upgraded radiator - either a full aluminium one as replacement for the stock piece, as AR Design is offering it, or the additional water cooler from the BMW Performance package (see Mr. 5's thread recently). The latter may however not work with all other mods such as CAI due to space restrictions in the engine bay.

Alpina_B3_Lux

[SukSqueezeBangBlo]

1. You should change your oil every 4k miles if u want your turbos really to last long.

2. Don't boost( stay in vacuum) at all until the oil is about 190F ...

3. When 5mins from your destination don't hit any boost and allow 2 min idle cool down.

[alextremo]

Originally Posted by Alpina_B3_Lux

It's a very useful thread you've made here.

Maybe one could also think of adding (in the modifications list) the possibility of using an upgraded radiator - either a full aluminium one as replacement for the stock piece, as AR Design is offering it, or the additional water cooler from the BMW Performance package (see Mr. 5's thread recently). The latter may however not work with all other mods such as CAI due to space restrictions in the engine bay.

Alpina_B3_Lux

Thank you! I''ll add these to the first post when I have some free time.

Originally Posted by Mattgfx

1. You should change your oil every 4k miles if u want your turbos really to last long.

2. Don't boost( stay in vacuum) at all until the oil is about 190F ...

3. When 5mins from your destination don't hit any boost and allow 2 min idle cool down.

I think these are all covered in the first post (although the timing/frequency may vary slightly)