The one they ran in FP1 today, albeit briefly, was swapped out of the car in Bahrain after Qualifying due to 'precautionary concerns'
The one used in FP2 today, was the one used in the Bahrain race - seems like they were right in Bahrain.
So, given that the one used in Malaysia was a new engine for that race and went foom. I believe he also had a new engine for Australia.
It looks like that Alonso has has 4 different engines in the car already - 2 are destroyed and 2 are part used. So, if you say that the 2 part used have already done race distances, it looks like all his remaining engines will be doing a minimum of 3 race distances, plus qualifying and the free practice sessions.
Anyone wondering if Ferrari will be turning the revs down wherever possible now?