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Technical Specification
PRODUCT NUMBER PRD00004056PRD00004049PRD00004033PRD00003003PRD00003005PRD00003009PRD00003234PRD00003014PRD00003004PRD00002308PRD00002264PRD00002249PRD00004044PRD00004642PRD00004057
Density, 15°C 0.8690.9080.8470.8920.0090.9090.0850.8680.8920.86650.8960.8590.90.90.875
Flash Point (COC) 210215180178182178210178202222216175175170
Kinematic Viscosity @40°C 172.435837145.4172.543134.892.8145.4104134.93514614692.6
Pour Point -42-15-48-24-27-15-52-45-24-51-33-45-27-27-42
SAE 75W-14085W-14080W-9085W-14075W-9080W-9075w-9080w-9080W-9080W-9075W-90
Volume 202020202020202020820202020920209
Viscosity Index 17494180991069618515699154101175100100177
Oil Type Synthetic Technology base fluidSynthetic Technology base fluidFully SyntheticMineralPart SyntheticMineralMineralPart Synthetic
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Q 1. What axles is Castrol Transmax Axle Long Life 75W-90 designed for?

A. Castrol Transmax Axle Long Life 75W-90 is a fully synthetic rear axle fluid for passenger car, light commercial vehicle and 4x4 rear axles requiring a hypoid-gear lubricant with extended drain capability.

Q 2. What is Castrol Smooth Drive Technology?

A. Smooth Drive Technology is Castrol's proprietary formulation in the Transmax Axle Long Life range, supporting smoother gear engagement particularly under stop-start driving and extreme conditions such as towing.

Q 3. Is Castrol Transmax Axle Long Life 75W-90 a synthetic fluid?

A. Yes, Castrol Transmax Axle Long Life 75W-90 is a fully synthetic rear axle fluid.

Q 4. What classification does Castrol Transmax Axle Long Life 75W-90 meet?

A. Castrol Transmax Axle Long Life 75W-90 is positioned within the API GL-5 hypoid axle gear oil class. Verify the specific OEM-approval set against the current product label.

Q 5. What is the difference between API GL-4 and GL-5?

A. API GL-4 is the performance category for manual transmission gear oils. API GL-5 (this product) is the higher-extreme-pressure category for hypoid axles and final drives subject to higher shock loading. The two categories are not interchangeable — use the specification required by the equipment manufacturer.

Q 6. Is Castrol Transmax Axle Long Life 75W-90 suitable for towing?

A. Yes, Castrol Transmax Axle Long Life 75W-90 is positioned for stop-start or extreme conditions including towing, with the Smooth Drive Technology supporting axle component life under high-load conditions.

Q 7. What is an API/ACEA classification?

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.

Q 8. What is an OEM Specification?

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.

Q 9. What is an OEM Approval?

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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