it needs a rebuild mate..that sounds like blow by(oil passing the rings)..
Might get away with a hone and re ring but more likely a rebore and new pistons..
Best thing to do is monitor your oil ussage,around a ltr per 1000 miles if your booting it about any more and youve got issues....
Any one saying this is normal is putting their head in the sand!!!also if it was fuel smoke it would be dark grey/black and means you need a better map..


cheers danny