With many lube oil systems, it is common to cool the oil before it is pumped to the end user (engine, compressor, etc). However, for large centrifugal compressors, it is common to pump the lube oil hot, and cool the oil immediately before it enter the compressor. Since we know that cool oil extends the life of the lube oil pump, why would we do this?

Question

With many lube oil systems, it is common to cool the oil before it is pumped to the end user (engine, compressor, etc).  However, for large centrifugal compressors, it is common to pump the lube oil hot, and cool the oil immediately before it enter the compressor.  Since we know that cool oil extends the life of the lube oil pump, why would we do this?