Oil Temperature Operqting Range

[Rthirsty6]

Anyone aware of the acceptable operating range please

Yep, mine (MY10) also has oil temp.
As for operating range, shouldn't worry below 110-115 deg as oil can handle higher temperatures. If during track use it rises higher then it's time to start looking for an oil cooler. I do same as Rocket, don't push hard until oil is in vincinity of 90deg. Once oil is up to operating temp all engine components have reached their operating tolerances (as designed), which they don't when the coolant temp reaches 90deg!!

For the people that don't have the read-out, you can buy strips that you can stick to the sump that record the highest temp reached. It's not ideal, but if you do go on a track then at least it's something to measure what the temp has been. Better then nothing I guess...

[Highlander]

Did a 100km Sydney/ Bowral trip this afternoon and paid particular attention to all temperatures. Easy cruise. 110k on the F6, 80/100k Appin Road and then 110k back on the Hume Freeway.

Outside temp ---- never under 30 degrees

Inside temp 21 degrees with aircon coping well

Oil temp - fluctuated between 98 and 106 degrees. Highest temp was in 50k section through Appin. Lowest on the freeway but no consistent correlation. Not the way I expected it to be but higher speed may have something to do with cooling.

Water Temp - rock steady on that software tricked 90 degrees

Car now has 900k on the clock and fuel needle is not in the red yet. Average is 6.2 l/100km at this stage. Mix of highway and city driving (in peak hour).

Without the V6's extra 100kw and 4 motion I have to find something to amuse me on solo trips.

[Rthirsty6]

Oil temp - fluctuated between 98 and 106 degrees. Highest temp was in 50k section through Appin. Lowest on the freeway but no consistent correlation. Not the way I expected it to be but higher speed may have something to do with cooling.

General rule of thumb is the harder the engine works the more the oil temp increases; friction of all moving components (particularly pistons) generates heat, and oil is as well as a lubricant also a means to transfer heat (away from the internal moving parts). The lower the car speed the less the engine sump (= engine oil) is cooled. So driving fast on a windy stretch of road will increase the oil temp (as you experienced) whilst freeway driving will likely maintain temperature, unless you drive 200+ km/h as the engine will have to work very hard to overcome aerodynamic drag, which increases exponentially when speed increases. Modern cars are all designed to maintain correct oil temp during "normal" driving conditions. Sumps nowadays are mostly aluminium with profiles that increase the surface to allow more surface area to dissipate the heat. Some cars (generally high performance) have oil coolers fittted to assist with this.