The Mobil Rarus™ Excel Series is our improved premium performance ashless air compressor lubricant primarily intended for the lubrication of severe duty rotary screw and vane air compressors. These products are formulated with very high quality mineral base oils and a high performance additive system designed to provide exceptional equipment protection and reliability for compressors operating under severe conditions. Mobil Rarus™ Excel Series provide excellent wear protection and outstanding resistance to oxidation and thermal degradation leading to reduced deposit formation. Mobil Rarus™ Excel Series exceptional water separation characteristics reduce emulsion formation and carryover into downstream piping and equipment.

Datasheets

Features and Benefits

The use of Mobil Rarus™ Excel Series can result in cleaner compressors and lower deposits compared to conventional mineral oils, resulting in longer running periods between maintenance intervals. 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

 

 

Reduced Vanish and Sludge Formation

Improved valve performance
Reduced deposits in discharge lines
Reduced potential for fires and explosions in discharge systems
Improved compressor performance

 

 

Outstanding Oxidation and Thermal Stability

Longer oil life
Improved filter life
Lower maintenance costs

 

 

Exceptional Water Separability

Less carryover to downstream equipment
Reduced sludge formation in crankcases and discharge lines
Reduced blockage of coalescers
Less potential for emulsion formation

 

 

Effective Rust and Corrosion Protection

Improved protection of internal compressor components

 

Applications

Mobil Rarus™ Excel Series are primarily intended for rotary screw and vane air compressor. Mobil Rarus™ Excel Series are particularly effective in screw type compressors with oil injection cooling and in units with continuous high temperature operation (in line with DIN 51506 indications). The product is compatible with all metals used in compressor construction and with mineral-oil compatible elastomers used in seals, O-rings and gaskets.

 

Mobil Rarus™ Excel Series are not intended or recommended for use in air compressors for breathing applications.

The following types of compressors have shown excellent performance with Mobil Rarus™ Excel Series:

  • Rotary screw compressors
  • Rotary vane compressors
  • Compressor systems with critical gears and bearings
  • Compressors used in stationary and mobile applications

Specifications and Approvals

Mobil Rarus™ Excel Series meets or exceeds the requirements of:

32

46

68

DIN 51506:2013-12 VDL

X

X

X

CHINA GB 12691-1990, L-DAB

X

X

X

 

Typical Properties

Mobil Rarus™ Excel Series

32

46

68

ISO Viscosity Grade

32

46

68

Density @ 15ºC, ASTM D 1298

0.85

0.86

0.87

Viscosity, ASTM D 445

 

 

 

cSt @ 40ºC

29.1

44.5

64.9

cSt @ 100ºC

5.4

7.0

8.9

Viscosity Index, ASTM D 2270

120

116

108

Demulsibility @ 54°C, min, Time to break, ASTM D1401

10

10

10

Copper Strip Corrosion, ASTM D130, 3 h @ 100º C

1B

1B

1B

RPVOT, min, ASTM D2272

2577

2123

1758

Rust Characteristics; ASTM D665 B;

Pass

Pass

Pass

Foam Seq I, mL/mL, ASTM D 892

10/0

20/0

0/0

Flash Point, ºC, ASTM D 92

236

238

242

Pour Point, ºC, ASTM D 97

-36

-30

-33

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, or will be provided by seller to customers if and as legally required. This product should not be used for purposes other than its intended use. If disposing of used product, take care to protect the environment.