Oil temp over 110c is f***ed. 90c seems fine for the sump. Few options for those high readings. 1) each brand as different response curve for the sensor, so it could just be different sensor gauge combo. Even different generations of the same product can vary. 2) Maybe they have the same gauge but different sensor. Or the aren’t running it in the sump and have it tee’d off the head etc.   3) there gauge is broken. Could be needle is physically out or alignment, or internal component worn.    4) if it’s really old type where the sensor has what looks like a coil spring the whole length of the cable another heat source along the way like headers or turbo can throw it off. You may need to sleeve it in something too reduce the heat along its path and get a true reading.  

Sound a used reasonably priced COBB for the OBXT and got that updated and loaded today. Hope to test it next week. 

Assessed the new toy, will give it a decent tidy up in the weekend and hopefully get it installed:

https://autotrader.co.nz/showroom/subaru/subaru-announces-trio-of-sti-tuned-special-editions-for-tokyo-auto-salon   Like shuffling deck chairs as the Titanic goes down...   Why don't they pull finger and build a real STI.   🤣  

Indeed, I know its not the most accurate spot, but purity and all that. I'm not too concerned about absolute precision (otherwise Subaru would instruct differently ie cylinder 3 gallery plug), more just gauging that I'm in line with other systems considering all this stuff is almost 30 years old   I still wonder how in the heck it could ever read 120-130+ in that location though...