Mobil Polyrex EM Grease

Mobil Polyrex EM Grease

0.00 LBS

Mobil Polyrex EM is a blue in color NLGI 2 polyurea grease specially formulated for electric-motor bearings. The advanced thickener formulation and proprietary manufacturing techniques provide improved bearing performance and protection for long electric motor life. 

Tubes contain 13.7oz (388g) each. 


  • Outstanding grease life: Outstanding long-life, high-temperature lubrication of ball and roller bearings, particularly in sealed-for-life applications. 
  • Advanced polyurea thickener: Increased durability versus conventional polyurea greases when subjected to mechanical shear forces. 
  • Excellent corrosion resistance: Provides protection against rust and corrosion. Provides additional protection under mild salt-water wash conditions. 
  • Low-noise properties: Suitable for lubrication of ball bearings in many noise-sensitive applications. 


  • Electric motor bearings 
  • Fin fan bearings 
  • High-temperature pump bearings 
  • Factory-filled, sealed-for-life ball bearings 
  • Ball or roller bearings operating at high temperatures where low oil separation is required 
Typical Properties  Mobil Polyrex EM 
NLGI Grade 
Color  Blue 
Base Oil Viscosity, ASTM D 445   -
cSt @ 40C  115 
cSt @ 100C  12.2 
Viscosity Index, ASTM D 2270  95 
Penetration, ASTM D217 worked, 60x, mm/10  285 
Penetration Change after 100.000 strokes, ASTM D217, mm/10  40 
Dropping Point, ASTM D 2265, C (F)  260 
Oil separation test, ASTM D 1742, %  0.5 
High Temperature Grease Life, ASTM D 3336, Hours @ 177C  750+ 
4-Ball Wear Scar, ASTM D 2266, @ 40kg, 1200 rpm, 75C, 1hr, mm  0.41 
Low Temperature Torque, ASTM D 1478, g-cm @ -29C   - 
Starting  7500 
Running  800 
EMCOR Corrosion Performance, 10% Synthetic Sea Water ASTM D 6138  0,1 (No Rust) 
Rust Protection, ASTM D 1743, Distilled Water  Pass 
Copper Corrosion Resistance, ASTM D 4048  1A 
Water Washout, ASTM D 1264, %  1.9 

8 Reviews | Write a Review.

  • 5
    Purchasing hard to get grease

    Posted by Troy at JCI on Aug 30 2023

    This grease is hard to come by, took sometime to get but was worth it, thank you

  • 5

    Posted by Jacq Chin on Jul 10 2023


  • 5

    Posted by Dustin stevenson on Jun 22 2023

    Came in quicker than I thought.

  • 4
    Mobil Polyrex EM

    Posted by W. B. Lucas on Jun 21 2023

    Thank you for following up and completing my order after the shortage was over

  • 5
    This is now THE standard electric motor ball bearing grease.

    Posted by Curtis Cameron on Mar 23 2020

    See review above.

  • 5
    Good deal

    Posted by None on Mar 26 2018

    fast and easy good pricing

  • 5
    Excellent Product and Prompt Shipping

    Posted by Gary on Jun 01 2017

    Easy Ordering, Quick Shipping, Neatly packaged. Excellent Product and Excellent Price

  • 5
    Great product

    Posted by Kevin on May 04 2017

    We use this grease in all of our electric motors, it hasnt failed us yet! PCS also sells it at the best p[rice i could find.

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