I've got an 88 t2 with 188000km, from what I've read rotaries don't really last very long. So here's my problem, I've got my engine to idle perfect, I've changed to lucas 20-50 oil and just recently added 3 inch mandrel full exhaust from the turbo to an apexi N1. Also I've just added washers to the oil bypass thermo pellet to increase my oil pressure, it was really low before. She boosts great and pulls hard but when I open her up to full throttle she blows blue smoke. Now I'm wondering if the engine is getting a little worn and tired. I still have the OMP and am not running premix, sub zero start is still hooked up in case this has anything to do with it. Any help is greatly appreciated, thanks.

the turbo is probably starting to leak oil is my guess.