Sometimes a compressor gets changed and that was not the problem. The next information is for David Wells. It is about the compliance of the scroll compressors. That means that the longer they run the better the sealing betwin the two scrolls will be. A good analogy are piston rings in the cylinders when they are new.
Scroll compressors made for cars are also compliant but only radially.
Copeland compressors are compliant radially and axially. I don't know if all Copeland models are like that but if that is so, it means that they will not suffer from scroll-spiral seal wear, like car scrolls do. That is all I know about compliance. You ask if the scrolls move axially to pass a slug of oil. The scrolls don't move away axially from each other to pass a slug of oil.