The Bosch CAN SYSTEM developed for cars. I wish to find a solution to feed the oil temperature signal through an Arduino UNO R3 to a 2.4in TFT Dsply
Welcome to the Arduino forum.
This is not a place where you ask people to do your research.
Please provide links to the documentation on your Bosch CAN SYSTEM.
You need to see if that CAN message exists for your car , then look at canbus interfaces for Arduino to be able to read it , then output to your screen