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| SERVICE | DELIVERY PRICE | DELIVERY TIME |
|---|---|---|
| Standard Delivery | £14.99 | 7 to 10 working days |
| SERVICE | DELIVERY PRICE | DELIVERY TIME |
|---|---|---|
| Standard Delivery | £14.99 | 7 to 10 working days |
| SERVICE | DELIVERY PRICE | DELIVERY TIME |
|---|---|---|
| Standard Delivery | £4.99 | 5 to 7 working days |
| SERVICE | DELIVERY PRICE | DELIVERY TIME |
|---|---|---|
| Standard Delivery | £14.99 | 5 to 7 working days |
| SERVICE | DELIVERY PRICE | DELIVERY TIME |
|---|---|---|
| Standard Delivery | £14.99 | 7 to 10 working days |
Product Number: 15D8AB
Variations
Castrol Transmax Manual Long Life 75W-85 is a fully synthetic transmission fluid recommended for most commercial vehicle manual transmissions (truck, bus, light commercial vehicle) where API GL-4 lubricants are required. These transmissions are typically synchromesh-based and benefit from the synthetic fluid's stability across cold-start and high-load conditions.
The SAE 75W-85 gear oil viscosity is positioned for modern commercial vehicle manual transmissions specifying a light multi-grade gear oil for extended drain intervals and fuel-efficiency benefits.
Approvals and performance levels include API GL-4.
Castrol Transmax Manual Long Life 75W-85 is also available in a 208-litre drum (15D8AE) for workshop bulk supply. Related products in our catalogue include Castrol Transmax Manual Z Long Life 75W-80 (a lighter ZF-specific fluid).
The 20-litre pack format is suited to single-machine top-up and small workshop service. Store sealed in the original packaging, in a clean, dry area away from extremes of temperature, to preserve product performance over its shelf life.
Castrol Transmax Manual Long Life 75W-85 is a full synthetic transmission fluid recommended for most commercial vehicle manual transmissions (truck, bus, light commercial vehicle) where API GL-4 lubricants are required. These transmissions are generally larger and subjected to higher loads and temperatures than those in passenger cars: this product was developed for these particular requirements and is approved by a number of manufacturers.
About PartsForMachines:PartsForMachines is a premier e-commerce platform, founded in 2019 in Warwickshire, UK, specializing in aftermarket parts and services for construction, agriculture, and industrial machinery. We offer an extensive catalog of over 500,000 products. Standard delivery: 1–3 working days within UK mainland. We are proud to be an authorised distributor, giving customers extra confidence when purchasing genuine products from us. In addition, we provide a 30-day return policy for eligible items.
| Density @ 15C | 0.837 g/ml |
|---|---|
| Viscosity, Kinematic 100C | 11.9 mm²/s |
| Viscosity, Kinematic 40C | 64.6 mm²/s |
| Viscosity Index | 183 |
| Viscosity, Brookfield @ -40C (75W) | 18000 mPa.s (cP) |
| Pour Point | -60 °C |
| Flash Point, COC | 214 °C |
| Engine Parts | Product Number | Product Name | Recommended Units | Product Price |
|---|
Standard Delivery: £4.99
Delivery Estimate: 5 to 7 working days
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| Technical Specification | |||||
|---|---|---|---|---|---|
| PRODUCT NUMBER | PRD00003003 | PRD00002996 | PRD00002999 | PRD00003044 | PRD00003045 |
| Density, 15°C | 0.892 | 0.883 | .883 | 0.89 | .89 |
| Flash Point (COC) | 178 | 208 | 200 | 200 | |
| Kinematic Viscosity @40°C | 145.4 | 55.1 | |||
| Pour Point | -24 | -30 | -30 | -30 | -30 |
| SAE | 80W-90 | 15w-40 | |||
| Volume | 20 | 20 | 208 | 20 | 208 |
| Viscosity Index | 99 | 165 | 165 | 137 | 137 |
| Show More | |||||
A. Castrol Transmax Manual Long Life 75W-85 is recommended for most commercial vehicle manual transmissions (truck, bus, light commercial vehicle) where API GL-4 lubricants are required.
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. Castrol Transmax Manual Long Life 75W-85 meets API GL-4.
A. Yes, Castrol Transmax Manual Long Life 75W-85 is a fully synthetic transmission fluid.
A. API GL-4 is the performance category for manual transmission gear oils — suited to synchromesh manual gearboxes where extreme-pressure (EP) additive levels are moderate. API GL-5 is the higher-EP category for hypoid axles and final drives subject to higher shock loading. Use the specification required by the equipment manufacturer.
A. Both are Castrol Transmax fully synthetic commercial vehicle manual transmission fluids. The 75W-85 (this product) is the general-service grade for most commercial manual transmissions. The 75W-80 Manual Z is the ZF-specific lighter variant approved for extended drain intervals (up to 540,000 km per ZF) in ZF commercial transmissions.
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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