I realise this may be an old thread .... it would be nice to know what was your conclusion after the checkup.
My 159 2.2 jts, 2006 model,seems to run up to 110 oil temps when pushed, around 90- 100 on the 3k rpm cruising range. Coolant temperature stays fixed on 90c once warm.
I have verified these temps after coolant flush and oil changes respectively. I use shell helix ultra 5w40 on a 5000km oil changing interval and I flush the coolant every 2 years.
I would be interested to know what temps people get for this engine under specific conditions ( cruising around 3k on any gear above 3rd or pushed to 6k rpm on 3rd gear) and what type of oil they are running and at what ambient temps.