Providing Precision Lubricants and Lubrication Solutions


Reciprocating Compressor Oil: RPL-ACO1040

Product Description:

The RPL-ACO1040 compressor oil is a semi-synthetic oil formulated using highly refined, hydro-treated paraffin base oils and synthetic PAO fluids providing excellent overall performance and a high viscosity index that will allow it to out-perform traditional compressor oils. The product is designed for positive displacement (intermittent flow) compressors, reciprocating or piston type compressors (single-acting or double-acting units), and suitable for use in either water-cooled or air-cooled single stage and two stage units.

Horizontal and vertical reciprocating compressors operate at high-pressure ratios and elevated discharge temperatures. Therefore, it is important that the oil lubricates the crankcase bearings and components, reduces friction in the compressor cylinder, lubricates the inlet and outlet valves, and assists the sealing of the piston rings, valves and packing in the cylinder while resisting the effects of elevated temperatures and pressures.  RPL-ACO1040 is uniquely formulated to meet these demanding requirements.

In many cases, water condensation that occurs when compressed gas is cooled can displace the oil film on frictional surfaces inside a compressor. This disrupts the lubrication and causes rust or corrosion to occur.  RPL-ACO1040 is engineered to remain on cylinder walls in contact with wet gas.

Features and Benefits:

• High film strength

• Low volatility reduces oil consumption

• Protection against oil oxidation at high discharge temperatures reduces sludge and varnish deposits on valves and other working parts

• Compressor efficiency is improved through cleaner separators, valves and filters

• Excellent anti-wear properties and water tolerance

• Excellent rust and corrosion Protection

• Separates readily from water

• High flash point above 450F (230C) which reduces recompression and fire hazard risks

• Extends drain intervals

• Improves sealing for better compression.

• Equipment runs cooler with less energy demands.

Typical Operating Properties:

ISO Grade 100 --
Colour Amber --
97.6 ASTM D445
12.1 ASTM D445
Viscosity Index 160 ASTM D2270
Flash Point 243C / 470F ASTM D92
Pour Point -23C / -10F ASTM D97
Rust Test Pass ASTM D665
Copper Corrosion
Pass ASTM D130
4-Ball EP Test 200 kg ASTM D2783
4-Ball Wear Test 0.40 mm ASTM D2266
Demulsibility: Min. to 2ml emulsion @ 54C 20 minutes ASTM D1401
Demulsibility: Min. to 2ml emulsion @ 82C 10 minutes ASTM D1401
Foam Characteristics 0 / 0 / 0 ASTM D892
Specific Gravity
(Water = 1.0)
0.870 ASTM D1298
Operating Temperature Range Low -18C / 0F --
High 218C / 425F --

* Please note: The information, data and tables contained in this website have been carefully edited at the time of publication. However, no responsibility for possible errors or omissions can be assumed. We recommend contacting our Application Support Staff to discuss your specific requirements. We are constantly updating our products therefore technical data and specifications may change at any time without notice. 08/2017

Method of Application:

No special precautions are required. Follow regular maintenance instructions as provided with original equipment. Although RPL-ACO1040 compressor oils are compatible with conventional compressor oils, it is recommended to thoroughly drain and clean systems prior to switching over. Once switched, RPL-ACO1040 typically extends lube intervals up to at least 3 times conventional lubricants and often more. It is recommended that oil drain intervals be established by monitoring the oil condition with lubricant analysis to be certain. Lubricant requirements vary with the type of compressor and may be further influenced by operating pressures, temperatures and other factors.

Also consider that it is important to prevent excess oil feed since it can be a contributing factor in the development of carbon deposits especially on discharge valves, impairing function and leading to excessively high discharge temperatures.

Available Container Sizes:

Size Metric US Imperial
Gallon 3.79 L / 3.4 kg 1gal / 7.5 lbs
Pail 18.93 L / 16 kg 5 gal / 35 lbs
Keg 56.78 L / 54 kg 15 gal / 120 lbs
Drum 208.20 L / 181 kg 55 gal / 400 lbs
* NB: Sizes and weights are approximate.



Did you know?

Residue build-up is a  leading causes of premature wear, increased energy consumption and early component failure.

A properly selected compressor lubricant will help your equipment run smoother, quieter and for longer.


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Davley Darmex Precision Lubricants, 2011