[drymite]

Low oil consumption
I have this random smoking issue that happens
OE turbos 12000km car jus hit 290k km
Compression test all in spec didnt do a leak down.
So no smoke on cold starts. When engine is partially warm or operating temp i can hold the rpms at 1100 no smoke.. drive around no smoke on decel. I get the slightest smoke when im waiting a stop sign long enough... randomly when the engine usually is at half operating temp around the 160-170f i would get a bit smoke on decel from only the driver tail pipe: but after its warm and i do a WOT no smoking at all... only once i noticed on wot i got a cloud of blue smoke . But the same day i drove 3 hrs and no smoke at all. Im wondering could this possibly be a kinked oil drain the intermittently doesnt drain properly. My next suspect is the BMS PCV valve and the Gates PCV hose....
Mods
VRSF catless DPs
BMS intercooler
VRSF chargepipe
MHD stage 0 currently since turbo swap.

I couldnt find much reviews about the BMS pcv valve i was only able to figure out that Rb pcv valve uses a toyota part made to fit the N54 while BMS is completely aftermarket part. Also not sure of how good "gates" parts it was the only pcv hose i could find locally A year ago.

No codes aside from the catalytic efficiency codes.

[Mikasa_e92]

I use the RB pcv valve kit with mishimoto catch cans, both high and low pressure cans.

Gates are an ''OK'' aftermarket brand. i wouldnt suspect the hose to be at fault.

[Cloverdale]

You're modded N54 is at 290,000 kilometers? If so, you're playing with 'house money'.

[drymite]

290k km isnt even 200k miles...i seen many heavily modded n54s at higher mileage.and its not really "house money" if your doing the work yourself. Turned out to be the PCV valve the BMS one i had installed was to restrictive . Rb pcv solved the issue..