Leaderboard

Looking in the Haynes manual it gives the minimum oil pressure for oil at 80°C (110°C in the Citroen service box procedure after checking the oil level) as 1.3 bar at 1000 rpm and 3.5 bar at 4000 rpm. This would also depend on the oil being used. If you are measuring the flow with cold oil it will likely change as the oil heats up and becomes less viscous. Citroen's procedures show an oil filter cover being used with a pressure gauge tapping on it, so pressures measured here may be a bit different to ones at the pressure switch.