
Castrol
Castrol TRANSMAX DUAL Multi Vehicle_20L
Castrol Transmax Dual Multi Vehicle – Full Synthetic Dual-Clutch Transmission Fluid Product Overview Castrol Transmax Dual Multi Vehicle is a fu…
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Castrol Transmax Dual Multi Vehicle – Full Synthetic Dual-Clutch Transmission Fluid
Product Overview
Castrol Transmax Dual Multi Vehicle is a fully synthetic, premium-grade transmission fluid formulated to meet the unique demands of modern wet dual-clutch transmissions (DCTs). Developed with advanced Smooth Drive Technology™, it provides excellent frictional stability, consistent shift quality, and enhanced wear protection for long transmission life. This multi-vehicle fluid is designed as a versatile, single-solution lubricant that suits the majority of wet DCT applications used by major automotive manufacturers.
Dual-clutch transmissions operate under far higher stress and heat than traditional automatics or manual gearboxes. Each clutch operates independently, allowing seamless gear changes with virtually no power loss. However, this system requires a highly specialised lubricant capable of withstanding extreme pressure, temperature, and friction conditions while maintaining smooth clutch engagement. Castrol Transmax Dual Multi Vehicle answers this challenge through its balanced synthetic base oil composition and high-tech additive chemistry. It is engineered to maintain stable performance over extended drain intervals and to deliver precise, quiet operation even under heavy load or stop-and-go urban conditions.
The result is a cleaner, longer-lasting transmission fluid that reduces component wear, enhances gear synchronisation, and ensures rapid, consistent clutch performance for thousands of gear shifts.
Key Features & Benefits
1. Wide Vehicle Compatibility
Castrol Transmax Dual Multi Vehicle is formulated to serve as a true multi-application DCT fluid suitable for over 90 % of wet-type dual-clutch transmissions worldwide. It covers models from Ford, Volkswagen Group, BMW, Mercedes-Benz, Renault, Volvo, Nissan, and many other leading manufacturers. This allows workshops and fleet operators to simplify inventory and confidently service multiple makes using a single premium-grade transmission fluid.
2. Advanced Frictional Stability
The Smooth Drive Technology™ molecules in Castrol Transmax Dual Multi Vehicle adapt continuously to temperature, speed, and pressure changes. This ensures consistent clutch engagement and precise friction behaviour, resulting in smoother shifts, reduced shudder, and superior drivability across the entire service life of the oil.
3. Extended Transmission Durability
The fluid’s superior lubricity and anti-wear additives protect synchronisers, clutch plates, bearings, and gears against wear and scoring. By minimising metal-to-metal contact and maintaining a stable protective film under high load, it significantly extends the service life of both clutch components and internal gears.
4. Thermal and Oxidation Stability
Formulated with high-quality synthetic base stocks, the oil resists oxidation and sludge formation under prolonged high-temperature operation. It prevents varnish deposits on valve bodies and clutch plates, ensuring clean operation, consistent shift feel, and long-term system reliability.
5. Exceptional Shear Resistance
Dual-clutch systems rely on precise hydraulic and friction characteristics. Castrol’s robust molecular structure resists viscosity loss due to shear forces, retaining film strength and maintaining optimal frictional control over time.
6. Enhanced Protection Against Corrosion and Deposits
The fluid provides excellent corrosion protection for internal components, particularly in systems with aluminium and copper alloys. Its detergent-dispersant system keeps the clutch area clean, preventing debris accumulation that can cause erratic gear changes.
7. Improved Shift Smoothness and Noise Control
Optimised viscosity characteristics and advanced friction control additives ensure quiet, seamless shifts even in heavily loaded systems. Drivers experience reduced gear shock, faster shift response, and consistent performance over a wide temperature range.
8. Long Service Intervals
Owing to its high thermal stability and superior oxidation control, Castrol Transmax Dual Multi Vehicle allows for extended drain intervals where permitted by OEMs. This results in reduced servicing costs, less downtime, and improved operational efficiency for fleet and workshop applications.
Applications
Castrol Transmax Dual Multi Vehicle is recommended for:
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Wet-type dual-clutch transmissions used in European, Japanese, and American vehicles
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6-speed, 7-speed, and 8-speed dual-clutch systems designed by OEMs such as Ford, Volkswagen, Audi, Skoda, SEAT, BMW, Mercedes-Benz, Renault, Volvo, and others
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Vehicles requiring smooth and quick gear shifts under both highway and city driving conditions
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Performance-oriented vehicles where clutch response, shift quality, and heat control are critical
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Multi-brand workshops seeking one-product coverage for the majority of modern DCTs
This product is not suitable for dry dual-clutch or conventional automatic transmissions unless explicitly specified by the manufacturer.
Performance Specifications
Castrol Transmax Dual Multi Vehicle is suitable for use where the following specifications are required:
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VW G 052 182, G 052 529, G 055 529
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Ford WSS-M2C936-A (Powershift)
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MB 236.21 (Mercedes-Benz Dual-Clutch)
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BMW Dual Clutch Transmission (Getrag 7DCL750 and similar)
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Volvo Dual Clutch Transmissions
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Renault DCT and Nissan Matic DCT specifications
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Mitsubishi DCT Fluid SP III
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PSA (Peugeot/Citroën) DCS 6 and 7 applications
These cover most wet DCT systems that rely on friction-controlled engagement under pressurised conditions. For dry-clutch systems, use of the recommended OEM-specific fluid is advised.
Typical Physical Properties
Property | Typical Value |
---|---|
Appearance | Clear / Green |
Density @ 15 °C | 0.84 g/cm³ |
Kinematic Viscosity @ 40 °C | 35 mm²/s |
Kinematic Viscosity @ 100 °C | 7.2 mm²/s |
Viscosity Index | 165 – 170 |
Pour Point | –70 °C |
Flash Point (COC) | 230 °C (min) |
Shear Stability (ASTM D5621) | Excellent |
Oxidation Resistance | High |
Friction Durability (CEC L-45) | Outstanding |
These values are typical for guidance only and may vary slightly between production batches.
Handling & Storage Advice
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Store the product indoors in a clean, dry environment away from direct sunlight, dust, and moisture.
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Avoid exposure to extreme temperatures; ideal storage is between 0 °C and 40 °C.
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Keep containers tightly sealed when not in use to prevent contamination.
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Always use clean, dedicated dispensing tools to avoid cross-contamination with other fluids.
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Do not mix with fluids of unknown composition or from other manufacturers unless verified as compatible.
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Dispose of used oil and containers responsibly through authorised waste-management facilities in compliance with local environmental regulations.
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Consult the Safety Data Sheet (SDS) for detailed information on handling precautions, first-aid measures, and environmental safety.
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Under appropriate storage conditions, unopened containers have a typical shelf life of five years.
Advantages for Workshops & Fleets
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Reduced Inventory Costs: Serves multiple DCT applications, reducing the number of separate fluids needed.
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Simplified Maintenance: One-product solution for most wet dual-clutch vehicles simplifies servicing logistics.
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Enhanced Customer Satisfaction: Improved shift smoothness, reduced transmission noise and longer service intervals result in better end-user experience.
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OEM Compatibility: Covers a wide range of OEM specifications, providing confidence in application flexibility without sacrificing performance.