Castrol Brake Fluid DOT 4 4L

Castrol Brake Fluid DOT 4 is a high-performance synthetic brake fluid engineered to ensure maximum braking efficiency and exceptional system safety across modern vehicular configurations. Comprising a specialized blend of glycols and borate esters, it establishes elevated baseline wet and dry boiling points to maintain structural fluid integrity under heavy operation.

Product Description

During normal driving conditions and heavy stopping cycles, kinetic energy transfers directly into hydraulic brake lines as intense friction heat. Lower-grade glycol ethers can degrade rapidly under these conditions, lowering the system's vapour lock threshold and inducing dangerous brake fade or a sponge-like, soft pedal response. Castrol's advanced synthetic formula actively combats this decline by sustaining an elevated vapour lock threshold throughout its operating lifecycle, ensuring a crisp and immediate pedal response. Infused with professional-grade rust and corrosion inhibitors, it safeguards critical inner metallic surfaces against moisture-driven oxidation while managing rubber swell characteristics to prevent premature seal failures in sensitive hydraulic nodes. Supplied in an economical 4-Litre workshop bottle, it provides ample capacity for complete system flushes across multi-vehicle commercial fleets and heavy service workshops.

Key Features & Benefits

• Vapour Lock Protection: Engineered to hold its vapour lock point at a significantly higher level than conventional glycol ether fluids, minimizing the risk of fluid vaporization and brake fade under sustained thermal strain.
• Synthetic Ester Strength: Formulated with premium glycols and borate esters to achieve superior high-temperature stability, delivering an extensive safety reserve under severe towing or descent cycles.
• Universal Multi-System Mapping: Highly versatile hydraulic medium suitable for cars, motorcycles, and light commercial vehicles (LCVs) calling for either a DOT 3 or DOT 4 fluid classification.
• Broad Fluid Miscibility: Fully compatible with other hydraulic fluids meeting international FMVSS 116 DOT 3 and DOT 4 parameters (excluding specialized mineral oil systems). *Note: For maximum performance lifecycle reserves, avoid mixing with alternative fluid brands.*
• Advanced Component Defense: Provides comprehensive corrosion protection against absorbed moisture while precisely managing rubber swell to prevent structural hydraulic fluid leakage.

Product Specifications & Classifications

• Volume: 4 Litres (4L Bulk Workshop Bottle)
• Fluid Composition: Synthetic Base (Glycols & Borate Esters)
• Safety Compliance: FMVSS 116 DOT 3 & DOT 4
• International Standards: SAE J1703 & SAE J1704 | ISO 4925 | JIS K 2233 | AS 1960.1
• Recommended Service Lifecycle: Change every 2 years in the absence of explicit manufacturer guidance
• EAN Barcode: 9310084020209
• Part Number (MPN): 3377671

Recommended Application Guide: Castrol Brake Fluid DOT 4

Castrol Brake Fluid DOT 4 is an advanced, non-petroleum synthetic hydraulic fluid designed for closed vehicular braking and clutch networks. Below is a structured list of recommended mechanical and automotive application suggestions:

Passenger Cars & Daily Commuter Vehicles

• Standard Disc & Drum Brake Layouts: Ideal for daily-driven passenger vehicles requiring steady, reliable hydraulic pressure and responsive pedal feedback during everyday commuting.
• ABS-Equipped Systems: High temperature stability ensures rapid and precise pressure transfer through complex electronic Anti-lock Braking System (ABS) valve blocks.

Light Commercial Vehicles & Fleets

• Stop-and-Go Courier Vans: Protects light commercial delivery vehicles (LCVs) from thermal fluid degradation caused by persistent braking under heavy cargo payloads in urban traffic.
• Regional Fleet Utilities: Provides long-drain structural dependability for regional work vehicles traveling extensive highway distances over varying thermal environments.

Motorcycles & Powersports Equipment

• Street & Cruiser Motorcycles: Suitable for front and rear hydraulic motorcycle brake reservoirs requiring a stable DOT 4 medium that resists external moisture ingestion.
• Dual-Sport & Adventure Bikes: Offers robust hydraulic reliability for adventure bikes facing high brake caliper temperatures during technical off-road descents.

Hydraulic Clutch Applications

• Manual Transmission Clutches: Highly recommended for automotive and motorcycle manual transmission hydraulic clutch configurations specifying a non-mineral DOT 3 or DOT 4 fluid, ensuring consistent and smooth clutch engagement.

Important System Exclusions

• Mineral Oil Systems: Absolutely NOT compatible with specialized hydraulic systems requiring mineral-based fluids (such as certain Citroën, Rolls-Royce, or agricultural machinery layouts specifying LHM fluid).