it the turbo on the WRX oil cooled or air cooled?

 

The factory turbo on all recent Subaru models is water-cooled by engine coolant and both cooled and lubricated by engine oil. There is no forced air that flows past the turbo but there is a series of slots built into the hood scoop splitter plate that serves to allow some of the hot air to vent when the engine is shut off.

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0==WW==0
"…axles of evil…" - george w. bush

 

Yep. Both coolant and oil.

 

thanks