59900 kms, 2013, NZ new
In actual fact, while buttoning up everything, something else was leaking coolant. There was an O ring under the turbo that also leaked.
I suspect it's the age of the car where everything starts to leak.
Annoyingly, there was no indication that anything was wrong apart from the one "engine temp' message that flashed, and the fact that the reservoir level was down below the Min level. The engine's response itself was restricted by the ECU, but there was no code, no warning light, nothing, nada. But without any code you would think that the car had always been that 'slow'.
This is my son's car and he's just got back from finishing his year-long TI at another city so I'd just been able to drive his car. Don't know how long this had been an issue.