blue smoke on start up

[cdb gsi]

iv got a let in a corsa b when diving round it doesnt smoke.if i park up turn it off then come back to it and start diving again its got little bit off blue smoke for about a minute.is this just burnt oil sat in the turbo or somthing else:thumb:

[AlexW]

Valve stem seals problery

[auzzy2000]

as above

[Nobby]

oil return blocked?