I was able to find several threads mentioning the optimum oil temp. for the Renesis, but when does it get too hot/dangerous for the rotary?
210F? 220F 230F?
daily driving seems to be around 160 to 180.

 

i think it depends on where you mounted the oil temp sensor at. If you got the greddy oil filter adaptor, then it should ride about where you mentioned it, from 160-19o depending on how hot it is outside. I dont think you want to see it hit 230 from that location though.

If mounted from oil pan, i have no idear

 

IMO mounting a sensor on the oil pan isn't a great location to get sensor data from. Part of the pan's function is to cool the oil. You might as well get oil temperature data coming out of the motor. Getting readings of the oil going into the motor will provide a more accurate reading of the condition of your fluid.

...for the same reasons that taking coolant temperature data before your radiator doesn't really do much for you.

As for what is "too hot" and what isn't...well the starting point would be about 260 degrees. At about 260 degrees with coolant temperatures your coolant seals give way and your motor is toast. That's the end game temperature.

What would be too hot is going to depend on a few factors. Namely your viscosity. If you're running a 20w or a 30w viscosity then anything above 220 is going to be a yellow zone with 230 to 240 degrees being a "lift" zone. In my experience with the stock oil coolers 220 degrees is the tipping point by which your temperatures will rapidly climb. Prior to that, the oil cooling system can hold itself stable with coolant temps. Once it gets past 220 degrees it climbs fast. Using a 40w or 50w will allow you to run above 240 degrees without fear of causing serious engine damage BUT your still risking the motor so I would advise against it.

On the street I don't see anything above 220 degrees and that's with about 115 degree ambient temperature outside.

Anything between 180 and 210 degrees would be a safe zone. While having an oil temperature gauge is good, having a pressure and water temp gauge will give you a full picture of what is happening in the car.

 

Oil breaks down *faster* above 120 Celsius.

100-110 Celsius is "ok" range.

and anything above 130 ... you should really stop driving and find out wtf is going on.

 

Here you go with the Celcius **** again,


Trustbuddy,


The oil filter is the return after the coolers so that is a good spot and I think flash covered the rest but I am seeing about 200F max in hard driving but it has been unusually cold here (30-40F)

 

Thanks all for the quick reply.

 

Good info Flashwing

 

Really where the temp is taken is less important than understanding what it means to the oil

The oil breaks down when it gets too hot..... What type of oil will determine exactly what the " bad " temperature is.......

With the equipment we have we have no way to measure loaded bearing temps......but we can use "best guess" and figure if we keep general oil temps to a certain value we will be OK

Personally I use oil pan temps as my guide.....heres why....it shows me the soaked temp of the oil and how it changes with time. I had my oil temp sensor in the oil gallery after the cooler and I found the data less useful.

I have huge oil supply in my setup (12+ qts)and maybe this makes more sense in my system....

 

there you go about that big pan you have so jealous here and you are absoulutly right.
UOA are a good friend to us.
OD

 

I may have to break down and get that pan.

 

OP question already well answered so I'll just lend that in my normal daily driving commute I'm typically just north of 180 DegF, both coolant and oil temp's.

 

well, even though my question has been thoroughly answered, a comment like this helps me as well.
As other than the quarterly track days, most of my driving is just normal driving...

 

isn;t that MIAC. Marbles in a can.
What kind of Ambient temperature do you drive in?
I have read that it could be related to hot coolant through the throttle body.
Case for Coolant throttle bypass?

 

Look at the last post date.

 

Rofl

 

lol sorry was still getting used to the forum, noob mistake.

 

NP, thanks for searching.

 

my car runs at anything between 65 to 95 degrees Celsius but I have the stock oil cooler in the passenger side and a hks one in the drivers side (RHD, Australian car)