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A. Shell Corena S4 P 100 is for reciprocating (piston) air compressors operating under demanding conditions — high discharge temperatures, extended drain intervals, or where mineral oils have proven inadequate.
A. Yes, Shell Corena S4 P 100 is an advanced synthetic air compressor oil incorporating synthetic ester base fluids.
A. Shell Corena S4 P 100 is ISO VG 100 — the heavier synthetic compressor oil viscosity for high-duty reciprocating compressor service.
A. Ester-based synthetic compressor oils use synthetic ester base fluids — typically chosen for their resistance to thermal degradation and good detergency. Esters give long oil life and reduced deposit formation in reciprocating compressors operating at elevated discharge temperatures.
A. Shell Corena S4 P 100 meets ISO 6743-3 (compressor oil classification); DIN 51506 (industrial compressor oil specification); and DIN 51575.
A. Both are Shell Corena ISO VG 100 reciprocating compressor oils meeting ISO 6743-3 and DIN 51506. S2 P 100 is the mainstream mineral-oil range for standard-life service. S4 P 100 (this product) is the advanced synthetic ester-based range for extra-long-life service in severe applications.
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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