What’s Different?
Let’s take a look at the compressor oil market. Conventional petroleum-based lubricants are on their way out as compressor lubricants. That’s good – compressors run hot and they’re too expensive to sacrifice to lubricants that can’t stand up to heat. Petroleum oils oxidize readily in many compressor applications and cause significant damage, particularly to valves.
Replacing petroleum compressor oils are four synthetics: glycols, silicones, esters and polyalphaolefins (PAOs). Glycols and silicones are expensive and incompatible with other lubricants. Use the wrong lubricant for makeup oil in a glycol or silicone lubricated compressor and you’ve created a disaster. Contemplate a switch-over from glycol or silicone and you’re looking at a major system purging and clean-up.
Ester and PAO fluids offer much greater fluid compatibility. They are compatible with each other and with petroleum products, which makes upgrading older systems safe and easy.
A problem with ester fluids is they are not compatible with many paints, seals and plastics and they are expensive. They do, however, offer high temperature and keep-clean benefits.
 PAO fluids, such as REC and ROT, offer excellent hydrolytic stability (resistance to breakdown in the presence of water) performance, are compatible with all paints, seals and plastics, and are available at more reasonable prices.
So by combining the two, AMSOIL is taking advantage of the high temperature and clean performance benefits of the esters and the cost savings, component compatibility and hydrolytic stability benefits of the PAOs.
The new PC Series PAO-ester compressor oils work very well in high temperatures; are compatible with virtually all paints, seals and plastics; provide very good hydrolytic stability; offer keep-clean performance and long drain intervals; and are competitively priced compared to silicone, glycol and ester lubricants.
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