I sold the car. Couldn't live with the harshness of suspension ect.
As for issue I did get to bottom of it. One of the boost pipes, the one from turbo was slightly leaking as the lug had worn down. I replaced pipe and my mpg improved to around 50mpg
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Get under car and take a look at all pipes from turbo and see if you can see any seeping oil.
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there was oil seeping by the turbo and also by the intercooler?