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A. Shell Spirax S4 CX 30 is designed for modern transmission, final drive, oil-immersed brake and hydraulic systems in off-highway earthmoving and mining equipment. SAE 30 is the standard powershift viscosity for warm-ambient service.
A. Yes, Shell Spirax S4 CX 30 was previously named Shell Donax TC 30.
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.
A. Shell Spirax S4 CX 30 carries ZF TE-ML 03C; and Allison C-4.
A. Both are Shell Spirax S4 CX off-highway transmission, brake and hydraulic oils with the same approvals. CX 10W is the lighter single-grade for cold-climate operation. CX 30 (this product) is the heavier single-grade for general powershift service in warm conditions.
A. Powershift wet clutches require friction stability across the service life — multigrade additives (viscosity-index improvers) can shear and alter friction characteristics. CAT TO-4 class powershift fluids are therefore supplied as single grades (SAE 10W, 30 or 50).
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.
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