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      12-10-2025, 02:53 PM   #149
kolosy
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Drives: over potholes
Join Date: Dec 2008
Location: Chicago

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Quote:
Originally Posted by m3peat View Post
I’ll start asking here and tried searching a little here and there but will move it to the full track section if no solutions.
I have an 09’ with 170k miles and all the usual suspects replaced/upgraded/maintained (sans main bearings) but haven’t touched the radiator.

Car runs really well and engine feels good.

I’ve done one track day and oil temps were as expected, maybe a little over halfway to the 255* mark. It was also December, so cooler here in SoCal.
I have autox’d the car quite a bit and feel like oil temps come much closer to the 255* mark after each event and also closer than the one track day.

I have fresh oil (10w/60 LM) and the updated water pump (metal impeller).

Outside of upgrading my radiator, is there other solutions that won’t cost much?

I’ve put redline water wetter in before but can’t recall if the current coolant tank has it in there (if that even helps oil temps).

FWIW, the Autox’s I generally run at are 60-70 second runs and 8-15 minute breaks between each run. I push the car but generally in 2nd gear the whole time and rarely hit the limiter.
What are you trying to solve? 255 oil temps are fine for this platform. I have a csf oil cooler (and radiator and do88 dct cooler) and I get into the 260s on hot track days.
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Current '20 AG X7M50 (daily + track tow), M4 GTS (track), '21 X3 M40i (wife)
Recent Past '11 E90 M3 (track), '21 DG X5MC, '22 BG G82, '12 E92 M3 ZCP, '08 E93 M3, '18 F80 ZCP, '04 E46 M3

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