my gauges read as follows
1 oil press 7 bar when cold when driving 6 bar when warmed up 2 bar when ticking over when hot 7bar =100p.s.i!
2 boost gauge same as you but goes to 1.5 bar sometimes
3 oil temp 90 -100 degrees normal driving on all roads 110degrees my warning buzzer starts 120 degrees and above you need a bigger oil cooler possibly front mount as well