The Aussie Shed is an absolute legend, Motorvate DIY too 😍
I have an in-line oil temp sensor on my line to the oil cooler, and my oil pressure sensor is on the return line.
The location obviously has some impact on the reading, however if you're familiar with the reading when the motor is (presumably) healthy, you can just use that that to benchmark off.
I used the in-line sensors due to convenience and so I could leave the OEM stuff alone. From memory I still needed an aftermarket Oil pressure sensor paired with OBD for the other stats.
Yeah the reason I stopped persuing the Android auto/OBD/display path was due to the JDM display protocals made it very dificult to replicate on an aftermarket LCD screen. Could be different with a non-nav screen or the G37 screens but I was well and truely over the project to look into it any further.
Here's a link to what I was trying to acheive but eventually gave up on.
https://www.myg37.com/forums/audio-video-and-electronics/296526-how-i-replaced-upgraded-the-center-display-with-high-res-andriod-auto.html