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> I think you might have just found your problem. You're supposed to stagger > the ring gaps around the piston to control both the oil and the compression. > They shouldn't line up. > Do the rings stay in the same place, or do they gradually work round. I sometimes get a puff of smoke on start-up for a week or two then it doesn't smoke for months in exactly similar situation. I've explained it previously by suggesting there's an occasional random lining-up of the ring gaps which later changes and stops that drop of oil getting into the combustion chambers. Dave. UK VW Type 3 & 4 Club http://www.hallvw.clara.co.uk/ ------ ------------------------------------------------------------------- List info at http://www.vwtype3.org/list | mailto:gregm@vwtype3.org