Hi again after reading all your Oil pressure problem it is spot on the same & everything you said has also happened I have lately given it a Engine Flush with Pens Oil Flush & I have put Pens Oil 15w60 it also has a new high volume Oil Pump I have also had the inlet manifold off & cleaned everything & put in new Crow cam lifters & Air blown all push rods out clean the Motor was filthy in the V with a lot of grit & carbon I don't think the last owners gave it much Oil changes I have had the car for 3 & a half years & it had been running well until the last few months & when I just drive it slowly without giving much revs it doesn't tap or play up much but as soon as I put it under load that's when the oil light comes on & it plays up with rough idol & tappet noise but when I start it up again much later it taps for a little wile then it goes quiet again? I would like to know how many times did you give yours a Engine Flush & how often before your car improved please mate Glen.