Mobil Almo 527 is a mineral based lubricant used in rock drills, jack hammers, pavement breakers, drifters and other types of pneumatic percussion equipment and construction equipment. Almo 500 Series is a line of Mobil Lubricants commonly referred to as "Rock Drill Lubricants" that offer an optimum balance of adhesiveness, yet are emulsifiable enough to pick up moisture carried in the air stream reducing the negative effects of water on wear and corrosion. They do not form gummy deposits that could cause sluggish valve action. 27 represents the thickness of the oil which is an International Standards Organization Viscosity Grade (ISO VG) 100.
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