My 997.2C2S usually runs at around 200 with stop and go traffic during the hot summer months in Miami. It will clim to 225 only during spirited driving.

 

Today was 93deg outside - on a highway with third radiator oil was 208 and coolant was 189. I have solo dl meter plugged in so i can see all these channels in real time. In city traffic coolant gets to 197 then fans kick in to drop it down to 191, oil get may be 215 top in slow traffic with bursts. On a track on hot day 220 is normal. If it gets above 250 i would re-check why.

 

i've noticed the same thing as you guys

997.1 - in HOT weather crappy traffic, i've seen my oil temp go as high as 225.... but when cruising 60-80 mph the car cools back to 200.

while i don't expect much diff, i'm curious if these numbers will change at all after doing the oem 997.2 end conversion, supposedly there should be even more airflow to the rads during normal highway driving with large center deflector/radiator shrouds

 

Thanks for the feedback guys. I'm using Mobil 1 and been sending every oil sample off to Blackstone as well and getting good report cards so far.

 

Interesting read here:

http://www.machinerylubrication.com/...lubricant-life

Cliff notes:

"In 1903, Arrhenius won a Nobel Prize when he figured out the relationship between temperature and most chemical reaction rates. Often called the Arrhenius Rate Rule, it relates to the fact that lubricants, once they've exceeded their base activation temperature, will degrade (oxidize) twice as fast for every 10 degrees C (18 degrees F) increase in temperature. In fact, there are a range of problems associated with too much heat, such as:
• Additive and base oil decomposition is accelerated.
• Some additives will volatilize and escape into the atmosphere.
• Viscosity-index improvers shear down more rapidly.
• Microbial contaminants prefer warmer temperatures (but not scalding).
• Heat collapses oil films, causing accelerated abrasion and scuffing conditions.
• Hot oil shortens the life of filters and seals and accelerates corrosion.
• Both oil and grease are more prone to leakage.
• Grease separates faster (oil from thickener) at elevated temperatures.
• High surface temperatures can form carbonaceous gum and resins."

 

If concerned at all about oil temps in normal driving situations, change your thermostat if you haven't already done so. I'm not referring to the low temp versions, because I don't believe in their true benefits in understanding thermal management, but I have personally seen numerous times that a weak/sticking thermostat can cause temps to creep up over time on all 9*6 and 9*7 cars.
Most don't change, or think to have a shop change, the thermostat when even replacing the infamous waterpump. Worth the small investment if it means a 10-20 degree difference in average oil temp over the life of your car, especially on track.