HMM SOUNDS LIKE THE OIL SEALS IN THE TURBO HAVE GONE TO ME U SAY U FITTED A NEW TURBO OR WAS IT A NEW SECOND HAND ONE?

YES THERE IS A OIL PRESSURE PLUNGER IN THE OIL PUMP ITS AN UPRATED SPRING WHICH INCREASES THE OIL PRESSURE! ALTHOUGH CAN'T SEE THATS YOUR PROBLEM AS ITS THE SEALS IN THE TURBO