Product Description

The Mobil Vacuoline 500 Series family of products provides a versatile lubricant source for a wide range of industrial equipment.  The Mobil Vacuoline 500 Series of lubricants are high performance heavy duty circulating oils designed for the demands of No-Twist Rod mills, however their all round performance makes them a excellent choice for circulation systems lubricating gears and bearings. Mobil Vacuoline 500 Series are designed to meet the critical requirements of the Morgan Construction Company’s high speed No-Twist Rod Mills, as well as the circulation oil requirements of Danielli rod mills.

They are formulated from high quality base stocks and a proprietary additive system to provide superior wettability, extra oil retention and thin film protection against rust and corrosion.    Mobil Vacuoline 500 gives excellent resistance to oxidation and thermal degradation, and a high level of protection against wear. They possess excellent demulsibility that permits water and other contaminants to separate readily from the oil in the system reservoir.  The Mobil Vacuoline 500 Series are available in six viscosity grades.

Features and Benefits

The Mobil Vacuoline 500 Series family of products is well known and highly regarded world-wide based on their outstanding performance and the Research and Development expertise and global technical support which stand behind the brand. The highly versatile performance of Mobil Vacuoline 500 Series oils, has made them the choice of many users around the world for many decades.

Mobil Vacuoline 500 series are designed for lubrication of circulation systems of No-Twist Rod Mills, industrial and marine gearboxes, hydraulic systems plus a wide variety of ancillary equipment.

Features Advantages and Potential Benefits
Good protection against rust and corrosion through a balanced high performance lubricant formulation Fewer unscheduled stoppages and lower maintenance costs
Outstanding antiwear performance Excellent protection of critical bearings and gears
Excellent water separation characteristics Rapid separation of water for smooth, efficient operation, reduced downtime and undiminished wear protection
High resistance to oxidation and thermal degradation Long oil charge life and avoidance of costs of unanticipated production interruptions
Multiple application capability Inventory Savings


These oils are intended primarily for the lubrication of plain bearings, roller bearings, parallel shaft and bevel gearing. They are suitable as multipurpose lubricants in systems not subject to shock loading and which do not require extreme pressure performance. The Mobil Vacuoline 500 series possess good demulsibility that is retained under conditions of severe water contamination.  Mobil Vacuoline 500 series are used in applications using splash, bath and ring oil arrangements and all other application methods involving pumps, valves and auxiliary equipment. They are recommended for use in hydraulic systems where higher viscosity oils are specified. They are particularly resistant to the effects of prolonged high temperature exposure and perform well in circulating systems with short oil residence times.

Typical applications include:

•  No Twist Rod Mills

•  Moderate duty spur, bevel, helical and herringbone gear units

•  Circulating systems

•  Mobil Vacuoline 525, 528, 533 can also be used in hydraulic systems employing gear, vane, radial and axial piston pumps where high viscosity anti-wear hydraulic fluids are required.

•  Certain compressors and vacuum pumps handling air and inert gases provided the discharge temperatures do not exceed 150oC , not suitable for breathing air compressors

Specifications and Approvals

This product has the following approvals: 525
DANIELI Type 21-0.597654.F BGV No Twist Stand Block-TMB/TFS Rev 15 X
This product meets or exceeds the requirements of: 525
MORGOIL “No twist rod mill” Lubricants Specification X

Properties and Specifications

Property 525 528 533 537 546 548
Grade ISO 150 ISO 220 ISO 320 ISO 460 ISO 680
Copper Strip Corrosion, 3 h, 100 C, Rating, ASTM D130 1A 1A 1A 1A 1A 1A
Demulsibility, Total Free Water, Non-EP Oils, ml, ASTM D2711 39 38 36 39 35 36
Density @ 15 C, kg/l, ASTM D1298 0.88 0.89 0.89 0.89 0.9 0.92
Emulsion, Time to 37 mL Water, 54 C, min, ASTM D1401 15
Emulsion, Time to 37 mL Water, 82 C, min, ASTM D1401 15 15 15 15 15
Emulsion, Time to 40/37/3, 82 C, min, ASTM D1401 10 15 20 25
FZG Scuffing, Fail Load Stage, A/8.3/90, ISO 14635-1 12 12 12 12 12 12
Flash Point, Cleveland Open Cup, °C, ASTM D92 264 272 284 288 286 286
Foam, Sequence I, Stability, ml, ASTM D892 0 0 0 0 0 0
Foam, Sequence I, Tendency, ml, ASTM D892 10 5 5 10 5 0
Foam, Sequence II, Stability, ml, ASTM D892 0 0 0 0 0 0
Foam, Sequence II, Tendency, ml, ASTM D892 0 0 0 0 0 0
Foam, Sequence III, Stability, ml, ASTM D892 0 0 0 0 0 0
Foam, Sequence III, Tendency, ml, ASTM D892 0 0 0 0 0 0
Kinematic Viscosity @ 100 C, mm2/s, ASTM D445 10.7 14.4 18.8 24.4 29.4 36.9
Kinematic Viscosity @ 40 C, mm2/s, ASTM D445 89 146 215 309 453 677
Pour Point, °C, ASTM D97 -24 -21 -15 -12 -12 -9
Rust Characteristics, Procedure A, ASTM D665 PASS PASS PASS PASS PASS PASS
Rust Characteristics, Procedure B, ASTM D665 PASS PASS PASS PASS PASS PASS
Viscosity Index, ASTM D2270 99 96 96 96 95 89

Health and Safety

Health and Safety recommendations for this product can be found on the Material Safety Data Sheet (MSDS) @


It cannot be guaranteed that the product information given above is up to date. For the latest version of the Product Data Sheet we refer to the product library of ExxonMobil.