bottom end has done aprox 26000 miles,, im useing 10/50 oil and my turbo has a staggered rear oil seal.
i have now fitted a oil cooler to see if this helps and although its no were ner as bad as it was it still doing it it a little.

does the compression sound about right?? the info i found said it should be 8.5 bar at cranking wide open throttle