What did you do for your M3 today?

[ramzM3]

I think it's worth noting that since the temps tend to spike when sitting, it could be the AUX fan not spinning at maximum efficiency. Worth checking out since the aux fan is responsible for providing additional cooling when stopped.

Thanks! I'll see if I can find a way to test it and then maybe that will be the answer to this problem!

[ramzM3]

Have you checked your coolant mix is actually 50/50? Too much concentrate lowers the efficiency of the fluid as a heat removing medium or too little concentrate may effect the boiling point

No, all I can say is the shop recently changed out the thermostat and lower temp sensor said they added (or at least charged me for) 1 gal of coolant as well. I would like to think that it wasn't drained out entirely and they added a 50/50 mix back in. But, who knows? For all I know, I could have too much or too little concentrate. I'll never know for sure until I drain the entire cooling system and refill it myself the with known, proper ratio.

[nextlvel]

I think it was the lower temp sensor (it looks "shiny/newer"), I didn't realize there was an upper one as well. Yes, I still have the original rad.

I think it's worth noting that since the temps tend to spike when sitting, it could be the AUX fan not spinning at maximum efficiency. Worth checking out since the aux fan is responsible for providing additional cooling when stopped.

[davidinnyc]

I just bought this car as my second M3, so this is my first time servicing the vehicle. I’m assuming there hasn’t been an oil change performed for over 5K miles and the valve cover was leaking (which prompted the valve adjustment and valve cover replacement since I was already in there).

I’ll check the service documents but looks like they stopped keeping paperwork records around 60K. Owned by a few dealerships between 40K and 45K, then father and son combo owners for the last 30K.

David

[Andy2424]

what is your oil change interval and with which oil