Fitted the new sensor today, great service from Caterham sales again, started the engine and saw an immediate rise in the oil pressure, so took it down the road for a quick check and then after a while the pressure dropped again. This foam thing that Myles mentioned I pressume is the foam fitted in the sump, could this be the problem where it is breaking up and causing blockages?
Mature enthusiast Black with Silver stripe 1.8K super sport.