Not all oils perform the same job
A screw compressor lubricant is not simply “another industrial oil”. It may need to cool the element, lubricate bearings, seal rotor clearances and release air rapidly in the separator.
Consequences of mismatch
Wrong viscosity or weak oxidation/anti-foam performance can contribute to wear, deposits, excessive foaming, carryover and reduced reliability.
Before purchase
Confirm compressor model, OEM specification, operating temperature and environment. Never assume ISO VG 46 is universally suitable simply because it is common in compressor service.
This article is general technical information and is not a substitute for the equipment OEM manual, lubricant manufacturer recommendation or site-specific engineering review.