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Blue smoke is oil, black is diesel.
Since it only happens overnight I would suggest that it is oil trickling down the valve stems overnight.
Peter
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Thanks. In that circumstance would you not expect some oil consumption?
...over several thousand miles virtually nil consumed.
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It doesn't take much oil to produce a puff of blue smoke.
B9 (2016) 1.6 BlueHDi 100 Multispace XTR = Mine; B9 (2013) Enterprise 1.6 HDi Van = Hers.
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