synthetic brake fluid
Model No: DOT4+

Tongyi Oil-EV Full-Compatible Fully Synthetic Brake Fluid DOT4+ (HZY4)

DOT4+ / HZY4 National Standard
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Tongyi Oil-EV Full-Compatible Fully Synthetic Brake Fluid DOT4+ (HZY4)

Product Overview

Tongyi Oil-EV Full-Compatible DOT4+ Brake Fluid is a high-performance fully synthetic brake fluid specially upgraded for new energy vehicle dual braking systems. It perfectly adapts to the composite working conditions of new energy vehicles with coexisting regenerative braking and hydraulic braking, solving the problems of traditional brake fluid such as insufficient high-temperature stability, easy aging of seals and poor adaptive performance under frequent start-stop and high-load braking. It achieves full compatibility covering traditional fuel vehicles, hybrid vehicles and pure electric vehicles, significantly improving braking response sensitivity and providing long-term stable and safe braking protection for ABS, ESP and other electronic braking systems.

Core Technical Advantages

  • Oil-EV Full Compatibility: Specially formulated for new energy dual braking systems (regenerative braking + hydraulic braking). Universally applicable to fuel vehicles, HEV hybrid vehicles and EV pure electric vehicles, solving the mismatch problem of traditional brake fluid for new energy working conditions.
  • Ultra-High Boiling Point & Anti-Vapor Lock: Excellent high-temperature resistance, dry boiling point ≥260°C, wet boiling point ≥160°C. Effectively avoids vapor lock and braking failure caused by high-temperature heat decay during frequent braking, adapting to heavy-load and high-frequency braking of new energy heavy vehicles.
  • Superior Low-Temperature Fluidity: Maintains sensitive fluid transmission performance at -50°C, ensures rapid brake response in extreme low-temperature environments, and eliminates delayed braking failure in cold weather.
  • Enhanced Anti-Corrosion & Seal Protection: Optimized anti-aging and anti-corrosion formula provides effective protection for metal pipelines, brake pumps and rubber sealing parts, suppresses seal swelling, aging and damage, reduces brake system failure rate and extends component service life.
  • High-Sensitivity Brake Transmission: Braking conduction sensitivity is 20% higher than traditional brake fluid. It accurately responds to instantaneous acceleration and emergency braking of new energy vehicles, ensuring precise and stable braking output.

Application Scope

Suitable for hydraulic braking systems of various imported, joint-venture and domestic fuel passenger cars. Fully applicable to hybrid and pure electric vehicles equipped with dual regenerative & hydraulic braking systems, compatible with ABS, ESP and all mainstream electronic braking assist systems.

Typical Performance Parameters

Test Item
Standard Index
Dry Boiling Point
≥260°C
Wet Boiling Point
≥160°C
Low-Temperature Fluidity (-50°C)
Excellent, no hysteresis
Applicable System
ABS / ESP / New Energy Dual Braking System

Packaging & Storage

Standard Package: 500g / 1000g bottle Shelf Life: 36 months (unopened, cool & dry storage) Storage Conditions: Store indoors at 0°C~40°C, keep tightly sealed to prevent moisture absorption and performance attenuation.

Important Notes

Do not mix with brake fluids of different grades or brands. Replacement should be carried out in accordance with vehicle maintenance specifications. Avoid long-term open placement to prevent moisture absorption affecting boiling point performance.