Nu-calgon NUCAL-4305-07 C-5s Refrigeration Oil 500 Sus 1 Gal

Product Description

The NU-CALGON NUCAL-4305-07 is a naphthenic mineral refrigeration oil formulated to lubricate moving parts inside air conditioning and refrigeration compressors. Rated at 500 SUS viscosity, this C-5s grade oil is engineered to maintain lubricity under elevated operating temperatures without requiring service or maintenance for the life of the unit. It must remain miscible with system refrigerants while retaining full lubricant properties. HVAC and refrigeration technicians rely on mineral oils like this one for long-term, trouble-free compressor performance in a wide range of sealed systems. This product is supplied in a 1-gallon container.

This oil is intended for use in refrigeration and air conditioning compressors where a higher-viscosity naphthenic mineral oil is required. The 500 SUS rating places it in the heavier end of the mineral oil spectrum, making it appropriate for applications that call for a C-5s specification lubricant. NU-CALGON offers this oil as part of a three-grade naphthenic mineral oil lineup alongside C-3s at 150 SUS and C-4s at 300 SUS, allowing technicians to match viscosity to the compressor manufacturer's specification.

Key Features

• 500 SUS viscosity rating — C-5s grade naphthenic mineral oil for heavier-duty compressor applications
• Formulated to stay miscible with refrigerants while maintaining lubricant properties
• Designed to perform without service or maintenance for the life of the refrigeration unit
• Part of a three-grade lineup (C-3s, C-4s, C-5s) for matching exact OEM viscosity requirements
• Supplied in a 1-gallon container for field and shop use

Compatibility

Designed for use in air conditioning and refrigeration compressors requiring a naphthenic mineral oil at 500 SUS viscosity. Always verify the compressor manufacturer's lubricant specification before adding or replacing refrigeration oil.

Installation Notes

Refrigeration oil service should be performed by a licensed HVAC or refrigeration technician. Before accessing the compressor or refrigerant circuit, recover refrigerant in accordance with EPA Section 608 regulations and de-energize the unit at the disconnect. Use only the oil type and viscosity specified by the compressor manufacturer — mixing oil types or viscosities can cause compressor damage or voided warranties. Dispose of used refrigeration oil according to local environmental regulations.

Technical Specifications

• Oil Type: Naphthenic Mineral Oil
• Grade: C-5s
• Viscosity: 500 SUS
• Volume: 1 gallon

Standard Information

• Brand: NU-CALGON
• Manufacturer Part Number: NUCAL-4305-07