When Compressor Oil Selection Really Matters
Reciprocating compressor oils are the most straightforward to substitute — they use relatively simple additive chemistry (anti-wear, rust inhibition, anti-oxidant) matched to ISO 6743-3 L-DAB or L-DAH specifications. Banesto's Compressor Oil ISO 100 is a direct equivalent for most standard mineral reciprocating compressor applications from 100 to 150 cSt at 40°C.
Rotary screw compressors are more demanding. The oil circulates through the compression chamber and must maintain a stable oil-air separation ratio over extended drain periods. The specific anti-foam, air-release and emulsion resistance profile matters more than the base viscosity alone. Banesto's mineral compressor oil meets these requirements for most general-purpose rotary screw applications, but OEM drain intervals may differ from branded alternatives. Always confirm the drain interval recommendation with Banesto's technical team when switching a rotary screw compressor.
The Refrigeration Gap
Refrigeration compressor oils (used with R22, R134a and similar refrigerants) require extremely low pour points (−40°C or below) and must be compatible with the refrigerant. Banesto does not currently offer a dedicated refrigeration grade. If you are operating R22 or HFC refrigeration systems, contact Banesto's technical team to discuss requirements.