The oil pressure on the engine was just fine when it was in my Moonie - always above 2.5 bar
So, I guess the turbo that Paul fitted may be getting past its best (although bizarrely, the 25,000 mile turbo turned out to be a duffer as well - it smoked soon after fitting to another car)
Good to see that car has found a home
Good to hear the engine was good for 2.5, most likely is the turbo as Paul said then. Paul did say the turbo had done 90K+.
I plan on getting a cheap duffer turbo and getting it reconned ready for if the current one gets worse.