Compressor fluids don’t wear out, and if properly maintained, can remain in service indefinitely. The PuroLubeplus Compressor Maintenance System is the ultimate in compressor maintenance taking fluid performance and savings to the next level. The PuroLubeplus system combines PuroLube Extended Life Compressor Fluid, the award-winning COP with Ion Exchange technology, PuroLube XTEND Additive Replacement Concentrate, and routine oil analysis to deliver unparalleled performance, savings and reliability.


While compressor oil purification is effective with any compressor fluid, maximum oil life is only achieved by beginning with the best, most advanced, compressor fluid available. Despite major developments in lubricant technologies, most compressor OEMs still supply their same old 8,000 hour formulations developed more than 30 years ago.


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All air compressor fluids are fortified with essential additives to enhance fluid performance and service life. During normal compressor operation, these additives continuously deplete to accelerate fluid degradation, acid production, and corrosion. PuroLube XTEND Additive Replacement Concentrate contains the same state-of-the-art additives used in PuroLube and can be added whenever additive levels get low to restore fluid chemistry, performance and protection, and further extend fluid service life.

Acids, whether ingested from the atmosphere or the normal byproduct of oxidation, are harmful to compressor fluids and the internals they are designed to protect. Allowed to accumulate in the oil, acids are catalysts that accelerate oil degradation and corrosion, and reduce the useful life of compressor fluids, bearings, coolers and all oil-wetted components. Fluid Metrics’ award-winning COP with patented ion exchange technology proactively and continuously removes harmful acids from the oil to provide maximum protection and service life to the oil and expensive compressor internals. Rotary Screw compressors using a COP routinely exceed 30,000 hours oil life when operating in normal environments.

About us

Fluid Metrics’ technologies are utilized and endorsed by many of the world’s largest compressor users, and are widely recognized as the best practice in rotary screw air compressor maintenance.

Fluid Metrics, LLC

4514 Chamblee Dunwoody Rd. #252

Dunwoody , GA 30338

Phone: (770) 393-8636

Fax: (770) 393-8631


Viscosity Index ASTM D2270 153
Viscosity, centistokes – cSt
@ 0° F / ‐17.8° C ASTM D445 690 cSt
@ 100° F / 37.8° C ASTM D445 26.9 cSt
@ 104° F / 40° C ASTM D445 24.9 cSt
@ 210° F / 98.9° C ASTM D445 5.2 cSt
@ 212° F / 100° C ASTM D445 5.3 cSt
Pour Point, ° F / ° C ASTM D97 ‐40 / ‐40
Flash Point, (COC) ° F / ° C ASTM D92 470 / 243
Flash Point, (PMCC) ° F / ° C ASTM D93 410 / 210
Copper Strip Corrosion, 3 hrs. @ 212° F / 100° C ASTM D130 1B
Ferrous Metal Corrosion, Rust Test
Distilled Water ASTM D665A Pass
Synthetic Sea Water ASTM D665B Pass
Foam Tendency (Sequence I, II, III) ASTM D892 0 (Nil)
Density, g/cc @ 25° C ASTM D941 0.98
Total Acid Number (TAN), mg KOH/g ASTM D664 0.18
pH Dow Method 7.9

Viscosity – cSt @ 40°C ASTM D445 44.4
Viscosity – cSt @ 100°C ASTM D445 7.3
Viscosity Index ASTM D2270 126
Pour Point – °F / °C ASTM D97 -58 / -50
Flash Point – °F / °C ASTM D92 501 / 261
Demulsibility ASTM D1401 Excellent
Foaming Sequences I, II, III ASTM D892 Nil
Specific Gravity ASTM D1298 0.89
Properties subject to change