Manual transmission oil that smooths gear changes and protects gearbox components, Castrol Transmax Manual MV Transmission Oil, is aimed at drivers who want a quieter, crisper shift feel. Drivers with worn or noisy gearboxes will appreciate reduced noise and more positive engagement. Is the 100% synthetic 75W-90 formulation the right choice for restoring synchroniser performance?
⚡ At a Glance
- • Viscosity Performance: 100% synthetic 75W-90 formulation for consistent protection and smooth shifting
- • Best for: Owners of manual gearboxes wanting smoother shifts and reduced gearbox noise
- • Not ideal for: Automatic transmissions or systems requiring manufacturer-specified fluids
100% synthetic manual transmission oil in 75W-90 grade, supplied in a 1-litre bottle. Designed to smooth gear changes, reduce gearbox noise and help restore worn synchronisers.
Smoother Gear Changes - with a 100% synthetic 75W-90 formulation
Fully synthetic base oils maintain stable viscosity across temperature ranges and reduce internal friction, supporting more consistent lubrication between gear teeth and synchronisers. The 75W-90 grade balances flow at cold start with film strength at operating temperatures.
Crisper, more positive gear engagement during everyday driving, making manual shifts feel more deliberate and less notchy.
Quieter Gearbox Operation - with a formulation that supports synchroniser engagement
Appropriate viscosity and synthetic chemistry reduce metal-to-metal contact and vibration during gear changes, which helps synchronisers mate more smoothly. User feedback specifically notes lower clatter and reduced noise after application.
Noticeably less gearbox noise, particularly helpful on older transmissions where wear has increased rattling and clunking.
Handy Maintenance Size - with 1-litre packaging for targeted top-ups
Single-litre containers are suitable for topping up or servicing part of the gearbox without opening large drums, reducing waste and simplifying small repairs. The volume is convenient for DIY servicing or workshop use.
Practical for targeted maintenance, allowing quick top-ups during a service or to address specific gearbox issues without excess leftover fluid.
✨ The 4 Key Reasons for Castrol Transmax Manual MV Transmission Oil
- Synchroniser Revival – Restores worn synchronisers for more positive gear engagement
- Noise Reduction – Lowers gearbox clatter, creating a noticeably quieter driving experience
- Shift Smoothness – Delivers crisper, smoother gear changes within everyday driving conditions
- 1-litre Bottle – Convenient size for targeted top-ups during maintenance or repairs
📋 Technical Details at a Glance
- Category: Automotive Parts and Accessories
- Brand: Castrol
- Product ID: B0CFYMD6KM
- Viscosity: 75W-90
- Composition: 100% synthetic
❓ Frequently Asked Questions
Q: Is this oil suitable for automatic transmissions?
A: The listing identifies the fluid as a manual transmission oil, the information does not confirm suitability for automatic gearboxes or ATF systems.
Q: Will this help with noisy or notchy gear changes?
A: User reviews report improved shift smoothness, crisper gear changes and reduced gearbox noise after using the oil.
Q: How much fluid is in each container?
A: Each unit is supplied as a 1 litre bottle.
🏆 Our Verdict
Suitable for drivers and workshops that maintain manual gearboxes or need to improve synchroniser engagement. The 100% synthetic 75W-90 formulation targets smoother, quieter shifting and crisper gear engagement. Durable synthetic chemistry and targeted benefits make a sensible long-term choice for manual transmission maintenance.
