View Single Post
      07-23-2025, 06:50 PM   #13
IamFODI
Captain
610
Rep
625
Posts

Drives: 2008 E90 M3 6MT
Join Date: Dec 2018
Location: SE PA

iTrader: (0)

Quote:
Originally Posted by tdott View Post
I friend with a 6MT that runs similar times as me, usually doesn't have oil temp issues. But we also don't run long sessions. He is on stock cooling system. His interior is stripped so he is lighter than my full interior dct car.

Here is a vid of his, this was in cooler temps (87) and it only hit around 260:

This was a time trial event, so we usually only do about 3-5 laps a session, I'm sure if he kept going temps would have crept up, but compared to my DCT I would have been above 280 already.
In high-80s ambient temps, I can go 10-15 mins before the oil temp gauge is between the 3/4 mark and max. I know people regularly run that high or more, but I'd rather have a bit more buffer.


Quote:
Originally Posted by tsk94 View Post
I think the cooling package as a whole is what's most effective. Oil temps affect water temp and visa versa. I'd suggest doing radiator and oil cooler at the same time.
Makes sense.

My coolers/radiators are all original at >171k miles, so probably due for a change. Normally my policy is to stick with OE unless there's very strong evidence that an aftermarket part will solve a problem I have and be worth the downside. Still trying to figure out if any aftermarket oil coolers clear that bar, but there are good looking options for the same or less money vs. OE (e.g. do88 at two-thirds the price), and I find it hard to imagine they'd be worse than stock or have a downside other than a little more weight. I guess technically they could obstruct air flow to the radiator a bit more, but feedback seems to suggest this isn't an issue. Hmmm...


Quote:
Originally Posted by tdott View Post
You'll need to search but I think I remember a handful of ppl mentioning recent do88 quality issues, like this one:
https://www.m3post.com/forums/showth...=do88+radiator
Oh wow. That's... not good. And very recent. Thanks for the heads-up.

Didn't know Litchfield made an oil cooler. They seem legit as a company. Might give that one a look.

Last edited by IamFODI; 07-23-2025 at 07:11 PM..
Appreciate 0