24V oil temps

[alexbaby88]

For those of you with oil temp gauges, what temps are you seeing in:
- hot stop-start traffic jams
- On track
- Highway cruising

Thanks

[erik325i]

On Track, I was seeing about 200*F.
This is with the Euro s50b32 plumbed up to an e28 m5 oil cooler.

Erik

[alexbaby88]

Wow only 200 deg F? That works out to about 93 deg C which is what my temps arewhen the engine is warmed up in normal street driving. Of course my M50 has no oil cooler. I saw just over 120 deg C after 4-5 laps on the track.

In heavy traffic on a hot day (ambient 35-40 deg C) it creeps up to nearly 100 deg C. Just wondering if this is normal for an M50.

[asubimmer]

Should be around 190 on the track. Although a little warmer means thinner oil so less power loss. But that would be so small it would only be noticeable on a dyno.

[erik325i]

Wow only 200 deg F? That works out to about 93 deg C which is what my temps arewhen the engine is warmed up in normal street driving. Of course my M50 has no oil cooler. I saw just over 120 deg C after 4-5 laps on the track.

In heavy traffic on a hot day (ambient 35-40 deg C) it creeps up to nearly 100 deg C. Just wondering if this is normal for an M50.

Now that I think about it, my oil temps may have been at 210 at the last track day. My oil system is definitely not stock though. I have approximately a 9.5L oil capacity.

Here are two good threads to look over:

http://forums.bimmerforums.com/forum/showthread.php?t=1257732

http://forums.bimmerforums.com/forum/showthread.php?t=1232668

Erik

[dude8383]

Now that I think about it, my oil temps may have been at 210 at the last track day. My oil system is definitely not stock though. I have approximately a 9.5L oil capacity.

Here are two good threads to look over:

http://forums.bimmerforums.com/forum/showthread.php?t=1257732

http://forums.bimmerforums.com/forum/showthread.php?t=1232668

Erik

wow thats an expensive oil change!

glad that someone else but me was curious about the oil temps. i haven't had a chance to install my oil temp sensors.

[matt]

It really depends on the oil you run. Dino will be toast at 260f, but synthetic will be OK.

200-240 is about right for running hard with synthetic.

[Mohammed_A]

i just installed the oil temp gauge from the mz roadster, im using the e30 oil cooler on my s50 euro swap, im getting a reading of +- 80 deg celcius , but remember im still running my motor in so no hard driving...is the reading correct?

[flyboyx]

i remember from one of my college automotive engineering classes my professor saying that as a rule of thumb, oil temp will in a healthy engine will normally be 40 degrees warmer than the water temp. by that standard, 80C seems a little bit low.

[alexbaby88]

So do you think its worth the effort for me to put in an oil cooler system for a car that is 99% street driven if I am seeing 100 deg C (210 deg F) on a hot day in heavy traffic? Would an oil cooler even make a noticeable difference to oil temps in traffic?

[flyboyx]

So do you think its worth the effort for me to put in an oil cooler system for a car that is 99% street driven if I am seeing 100 deg C (210 deg F) on a hot day in heavy traffic? Would an oil cooler even make a noticeable difference to oil temps in traffic?

that sounds to me like a good operating temperature for engine oil to me. it needs to get to a certain temperature so moisture and gasoline vapors will evaporate from the crank case. what would be your purpose for getting the temperature lower than that?

[alexbaby88]

to avoid any chance of pinking and also the engine seems to feel more lethargic when temps are high.

I wonder why the M20 had an oil cooler and the M50 doesn't?

[Drew325is]

M52B28 alloy block
7L oil capacity
M20 oil cooler

3-4 minute track sprint session at ambient temp ~15oC, oil temp tended to be about 95oC.

[pedal2metal]

to avoid any chance of pinking and also the engine seems to feel more lethargic when temps are high.

I wonder why the M20 had an oil cooler and the M50 doesn't?

Answer: More oil capacity in the M50, hence lower temps.