Sorry, I meant DI (direct inject).
I don't know first hand if the 12H-T has piston skirt cooling, I don't own a Toyota diesel. I'm a pore American smuck in which dreams of having a Toyota diesel.
The 2H/12H-T manual does list the 12H-T as having oil nozzles, which I believe are the skirt coolers. I'm not 100% sure if oil nozzle = piston skirt cooling? ???