All compressor have recommended oil temperatures but often a service person will come across plant where due to various factors (sometimes out of our control) a compressor will run with lower or higher oil temperatures than recomended.

What are the adverse effects from running a compressor with lower than normal oil temps? I was told once that bearings tend to skid rather than roll in cold oil. I suspect the time between rebuilds will be less? How important is correct oil temps?

I often see running oil temps around 30degC to 40degC, and were the manual states 50degC and start up temps as low as 15degC and these machines have been running like this since day one.