slight white/blue smoke on boost

[Freddy77]

i was told yesterday when being followed that when i ran on boost the exhaust smoked, i have had the boost pipes off to makes sure it wasnt the charger and they seem to be dry, got my mrs to give it a couple of revs while i looked and it and it isnt much but comes out on the over run if boosted, quite possible it would be more if under load but i cant see it when driving
not sure any help please

[Jezza-7]

Have you taken off the boost pipe from the top of the rad and then let it run to see if oil spits out?

You put the boost return pipe back on?

[Freddy77]

Yh I have put it back on now, and I disconnected it off there yeah, james mentioned it when were ob the way to that meet
Not sure if putting it back has made a difference cant see why it would

[PeteG40]

could be just sh1t from not being used much - a few g's do it... or could be stem seals - tend to just have a puff of smoke when letting off.