Rotary screw

Our Mobil Rarus SHC™ 1020 Series synthetic air compressor oils are designed to lubricate severe-duty rotary screw and vane air compressors. These outstanding synthetic air compressor oils are particularly suited for severe service applications where mineral products are not as effective.

Mobil Rarus SHC 1020 Series synthetic air compressor oils are formulated for excellent wear protection and resistance to oxidation and thermal degradation. These lubricants outperform mineral oils and help to:

  • Minimize downstream deposits and carryover
  • Reduce the potential for fires and explosions
  • Improve equipment performance and safety
  • Reduce maintenance needs and associated costs

Product series information

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Features and Benefits

The use of the Mobil Rarus SHC 1020 Series oils can result in cleaner compressors and lower deposits compared to conventional mineral oils, resulting in longer running periods between maintenance intervals. Their excellent oxidation and thermal stability safely allow extended life capability while controlling sludge and deposit formation. They possess outstanding anti-wear and corrosion protection, which enhances equipment life and performance.

Features Advantages and Potential Benefits
High Performance Synthetic Base Stocks Wide temperature range capability
Significant performance capabilities relative to mineral oils
Improved safety
Extended service life
Outstanding Oxidation and Thermal Stability Reduced coking deposits
Longer oil life
Improved filter life
Lower maintenance costs
High Load-carrying ability Reduced wear of bearings and gears
Excellent Water Separability Less carryover to downstream equipment
Reduced sludge formation in crankcases and discharge lines
Reduced blockage of coalescers, inter- and after-coolers
Less potential for emulsion formation
Effective Rust and Corrosion Protection Improved protection of internal compressor components


The Mobil Rarus SHC 1020 Series oils are primarily intended for rotary screw and vane compressors. They are particularly effective for continuous high temperature operation with discharge temperatures up to 200º C. Rarus SHC 1020 Series oils are recommended for units with a history of excess oil degradation, poor valve performance or deposit formation. They are compatible with all metals used in compressor construction and with conventional mineral oil-based air compressor oils but admixture with other oils may detract from the total performance capability.

Mobil Rarus SHC 1020 Series oils are not recommended for air compressors used in breathing air applications and should not be used in compressors where the discharge temperature is higher than the product flash point. 

The following types of compressor applications have shown excellent performance with the Mobil Rarus SHC 1020 Series oils:

  • Primarily recommended for rotary screw and vane air compressor
  • Very effective in screw type compressors with oil injection cooling
  • Units operating under severe conditions
  • Multistage units with a history of excessive oil degradation from mineral oil-based products
  • Compressor systems with critical gears and bearings
  • Compressors used in stationary and mobile applications


Typical Properties

Mobil Rarus SHC 1020 Series Mobil Rarus SHC 1024 Mobil Rarus SHC 1025 Mobil Rarus SHC 1026
ISO Viscosity Grade 32 46 68
Viscosity, ASTM D 445
cSt @ 40º C 31.5 44 66.6
cSt @ 100º C 5.7 7.2 10.1
Viscosity Index, ASTM D 2270 , min 127 131 136
Copper Strip Corrosion, ASTM D130,24 h @ 100º C 1B 2A 1B
Rust Characteristics Proc A, ASTM D 665 Pass Pass Pass
Pour Point, ASTM D 97, ºC, max -48 -45 -45
Flash Point, ºC, ASTM D 92 245 246 246
Specific Gravity 15º C/15º C, ASTM D 1298 0.846 0.849 0.856


Health and Safety

Based on available information, this product is not expected to produce adverse effects on health when used for the intended application and the recommendations provided in the Material Safety Data Sheet (MSDS) are followed. MSDS's are available upon request through your sales contract office, or via the Internet. This product should not be used for purposes other than its intended use. If disposing of used product, take care to protect the environment.