Mobil Rarus 827

Mobil Rarus 827

0.00 LBS

Mobil Rarus 827 Diester Synthetic ISO VG 100 Compressor Oil

Mobil Rarus 827 is an ISO VG 100, SAE 30 supreme performance air compressor lubricant primarily intended for the lubrication of severe duty reciprocating air compressors but not recommended for air compressors used in breathing air applications. It is engineered to meet or exceed the stringent requirements of the major compressor manufacturers. 

Mobil Rarus provides excellent wear protection and outstanding resistance to oxidation and thermal degradation, greatly superior to mineral oils. Its unique formulation provides the ability to help reduce maintenance costs by minimizing equipment problems and downstream deposits and carryover. It also has the following benefits: 

High Performance Synthetic Base Stocks: 

  • Significant performance capabilities relative to mineral oils 
  • Improved safety 

Low Ash and Carbon 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 

High Load-carrying ability: 

  • Reduced wear of rings, cylinders, bearings and gears 

Excellent 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 valves and reduced wear of rings and cylinders 


  • All types of air compressors but specifically recommended for reciprocating air compressor 
  • Units operating under severe conditions 
  • Multistage units with a history of excessive oil degradation from mineral oil-based products 
  • They can be used for cylinder and crankcase lubrication 
  • Compressor systems with critical gears and bearings 
  • Compressors used in stationary and mobile applications 

4 Reviews | Write a Review.

  • 5
    Mobil Rarus 827

    Posted by Dean on Nov 30 2020

    Great oil for our air compressor. Price was right and shipping was fast.

  • 5
    Mobil Rarus 827

    Posted by Bill on Apr 07 2020

    We are a car wash where the environment has a high level of moisture in the air, and where are compressors run not stop during our peak seasons. We switched to RARUS 827 over a year ago based on the recommendation of our compressor maintenance company.

  • 5
    Air Compressor Oil

    Posted by Nightfox on Dec 05 2017

    I use it for my 5hp compressors that run almost continuously in the winter. There are cheaper air compressor oils that maybe would work, but I'm afraid to use those since my compressors are used so hard. I don't really have much to compare it to. Do note that the container is not as shown. It comes in a silver metal can, not a red plastic pail. Not that it matters to me. I buy one or two a year.

  • 5

    Posted by Boot Sessoms on Aug 29 2017

    Ordered it for a scuba compressor, didn't need the 5 gallon but, couldn't find smaller container.

How to Find the Right Lubricant
Quality Base Oils: The Foundation of a Great Lubricant
Understanding Types of Lubricants: Base Oil Groups
Understanding Types of Lubricants: Synthetic Oils
The Ins and Outs of Oil Storage: What is the Shelf Life of Oil?
Why Lubricant Additives are Important
Bizrate 2023 Platinum Seven Time Winner

Safety Data Sheet
Product Data Sheet

Due to these products being hazardous, an additional shipping charge of $25.00 is automatically added to smaller "Ground Shipments". If you can order any combination of products that makes your total cart weight over 150 lbs. (which is considered "Freight Shipment"), this additional fee is waived. This can equate to considerable savings on shipping.

Sunoco Race Fuels is offering a Free Drum Pump with the purchase of a 54 Gallon Drum of Sunoco E85-R 99 Octane Race Fuel.
To add the free drum pump, first add the '54 Gallon Drum' to the cart, then click the blue 'Add FREE Drum Pump' button.

By entering your amount in the “Quantity” field, the price will automatically reflect the bulk discount below.