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A. Shell Spirax S2 A 85W-140 is blended for use in a wide variety of automotive axle units subjected to heavy-duty conditions — automotive transmissions and differentials requiring an API GL-5 SAE 85W-140 mineral hypoid gear oil.
A. Yes, Shell Spirax S2 A 85W-140 was previously named Shell Spirax A 85W-140.
A. Shell Spirax S2 A 85W-140 meets SAE J306 and is positioned within the API GL-5 hypoid axle gear oil class.
A. S2 G is the API GL-4 mild-EP range for manual transmissions. S2 A (this product) is the API GL-5 hypoid axle range for differentials and final drives subject to higher shock loading.
A. No — for limited-slip differentials use Shell Spirax S3 ALS 85W-90 or another LSD-approved gear oil with the friction-modifier additives required for LSD service. Standard API GL-5 axle oils such as the S2 A typically cause clutch chatter in an LSD.
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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