Oil burning trough exhaust problem

Hello,

first of all, I'm from Belgium so I apologize for my bad English,

I have a little problem, when my 335xi is getting warm (in the middle of 70 degrees and 120 degrees ) he smokes a minute or 3 blue smoke so he is burning oil, but when the engine is at max temp he is smoking nothing.. So I don't understand, if I had turbo problem he wil smoke very hard also at max temp I was thinking.. But that's not so I don't understand..

mods;

BMS dci
catless stock dp
jb4 G5 ISO on map 1

thanks in advance