20psi boost is that to high?

[Rumcajs]

Turbo has a "slight oil leak" is very broad description of a problem. Where is that leak? On the inlet (compressor side) or on the exhaust side (turbine) I wouldn't be surprised if the oil leak the morons are talking about is from all the oil mist turbo sucks from the crankcase breather thanks to unfriendly design (read Nissan/Toyo/Mitsu are too cheap to include oil separator) so there is a lot of oil in the intake itself which turbo than spreads through entire induction system. So fitting a oil catch can in the so called closed crankcase ventilation in the turbo charged engine is a must! What also doesn't help is that ZD30 sump is filled to the brim with oil once again because Nissan was too cheap to re-design the oil pan/sump (read making it bigger capacity) when they had early ZD30 genading because sump capacity and engine requirement for oil volume didn't add up among other design flaws
Research "catch can" e.g. Provent 200. That should be number one mod on any ZD 30 powered Patrols indeed on any turbodiesel having CCV and not having effective separator.
Cheers