by 
jonesy
ANSWERS: 1
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if the oil is coming directly from the turbo pipes, compressor or exhaust side, this would mean the inner seals are "blown" or damaged, meaning you should replace it to keep your vauxhall running at its best. do you idle it more than normal or drive in stop and go traffic often? is your air filter clean? is the cooler clean and functioning properly? these are also causes of oil leaking from turbo. i am not suggesting you go out and buy a new turbo, but i'd keep an eye on it, if it were to fail, it can cause severe damage to the engine.
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