Hello everyone Before I ask I have tryed to do research on this but still baffled, I'm getting alittle, not alot of smoke when on boost, now the engine was built fully just before I brought it Straight away I thought turbo oil seals or valve stem oil seals, spoke to pervious owner he has said these were replaced etc etc, I'm losing or think I'm burning more oil then I should be, probably 1 litre every 600 miles roughly surely this isn't right? No oil leaks anywhere either so if its not the turbo oil seals or stem oil seals and whole engine is like new everything changed and no leaks etc, Anyone got any tips please what else to check? Thankyou Pat