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A. Castrol Alpha SP 68 is for enclosed industrial gear units operating at higher speeds — including small enclosed gear units, some hydraulic-and-gear shared sumps and high-speed gear drives where the heavier industrial gear oil grades would generate excess churning resistance.
A. Castrol Alpha SP 68 is ISO VG 68 — the lighter industrial gear oil viscosity for higher-speed and smaller industrial gear units.
A. Castrol Alpha SP 68 is positioned within the DIN 51517 Part 3 (CLP) industrial EP gear oil specification.
A. CLP is the DIN 51517 Part 3 designation for industrial EP gear oils: C — circulation lubricant; L — with anti-corrosion and anti-oxidation additives; P — with extreme-pressure additives.
A. Both are Castrol Alpha SP industrial EP gear oils in the same range and meeting DIN 51517 Part 3 (CLP). They differ only in viscosity grade: Alpha SP 68 (this product) is ISO VG 68 for lighter-duty higher-speed gear units; Alpha SP 220 is ISO VG 220 for general-service industrial gearboxes.
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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