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A. Castrol Aircol CM 46 is for general-service reciprocating air compressors — ISO VG 46 is the most widely specified mineral compressor oil viscosity for industrial reciprocating compressor service.
A. Castrol Aircol CM 46 is ISO VG 46 — the most widely specified mineral compressor oil viscosity.
A. Castrol Aircol CM 46 meets ISO 6743-3 (compressor oil classification); and DIN 51506 (industrial compressor oil specification).
A. RPVOT is the Rotating Pressure Vessel Oxidation Test (ASTM D2272) — a standardised oxidation-stability test for industrial oils. The test measures how long an oil resists oxidation under controlled high-temperature high-pressure conditions, and is a key performance criterion for compressor and turbine oils.
A. Both are Castrol Aircol CM mineral-oil air compressor lubricants meeting ISO 6743-3 and DIN 51506. They differ only in viscosity grade: Aircol CM 46 (this product) is ISO VG 46 for general-service compressors; Aircol CM 68 is ISO VG 68 for higher-temperature reciprocating compressor service.
A. API and ACEA are the universal lubricant performance standards every reputable oil meets. They are your baseline check — match the code your handbook specifies (e.g., API CI-4 or ACEA E7 for heavy-duty diesel) and the oil is technically suitable for your machine. Every oil on our site lists its API and ACEA classifications.
A. An OEM Specification is the lubricant requirement set by a vehicle or equipment manufacturer (e.g., MB 228.3, VW 504.00). When an oil lists the code, the oil manufacturer has developed and tested it to meet the criteria the equipment manufacturer requires. Match the code in your handbook and you have a lubricant engineered for your machine.
A. An OEM Approval means the oil has been formally tested and signed off by the equipment manufacturer and listed on their official approved-products register (e.g., MB-Approval 228.3). An Approval confirms the oil is recognised by the equipment manufacturer for service use in their machines.
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