What is the correct oil presure on a 1994 306 xsi 2.0 ltr ?. I think I need a new presure sensor because when i start the car (hot or cold) the presure display on the dashboard jumps to max 8 bar if i turn the car off and on again i`ll get 6 bar on/off again i`ll get 4 bar?. when driving about 70 mph the engine will be at +/-4000 rpm, oil presure sometimes is 8 bar but mostly between 6-7 bar. Is this normal ?. Do i need a new sensor or is a new filter and oil change enough. Thanks Bren