Hello, I was wondering if anyone has had any experience installing bigger, or better, oil coolers in an e46 M3.   My oil temp isn’t too bad on bigger tracks, but at Loudon it hits 250 degrees or more, most of the time.   I always remove the plastic skid plate under the engine because it holds the heat in when the car is sitting still between sessions.   

I have been thinking about getting an oversized Fluidyne oil cooler and fittings from Turner but the price has always been a sticking point with me.   However, the nice thing about this oil cooler is that is fits in the same location as the OEM oil cooler.   This oil cooler kit costs over a $1000 but I don’t have any guarantee that it will do the trick.  Other companies make less expensive oil coolers but they would have to be located higher up in front of the radiator and I already have an aftermarket cold air intake that is taking up that space.   Bimmerworld sells something they call an oil cooler diverter valve for $80… which forces all the oil to go through the oil cooler, as opposed to just some of the oil which is the case with a normal setup... and it is not recommended for street use.  Anyway, I was hoping someone might have experience with this, or maybe has a better solution.  Thanks!

I drove without the underpanel in my E36 for a while.  As soon as i installed a new aftermarket underpanel (my original was gone when i bought the car) it lowered coolant temps by at least 10 degrees on the track. 

Christo