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Why don’t Japanese cars use dot4 brake fluid? The difference between dot4 and dot5.1

Blog 2年前 (2022-01-03) 295 Views

Original Japanese carBrake FluidThey are all dot3 types instead of dot4 brake fluid, which means that the use of dot3 brake fluid in Japanese cars basically meets the needs of vehicles, and there is no need to use better dot4 brake fluid, and the cost can also be effectively reduced.

Brake fluid cannot be mixed and used. For example, dot3 brake fluid and dot4 brake fluid are different; the main components of the brake fluid are different. If they are used in combination, their main components may undergo a chemical reaction, and the performance of the brake fluid will be reduced, and the heat resistance of the oil will also decrease, causing a certain amount of loss to the vehicle.

The difference between dot4 and dot5.1

The main component of dot4 is alcohol ether borate type, with a boiling point of 230 degrees Celsius. It is mainly used on ordinary cars. Dot4 has low metal corrosion, good rubber compatibility, is not easily affected by moisture, and has stable high-temperature braking performance. The main component of Dot5.1 is borate, which has a boiling point of 270 degrees Celsius. It is mainly used for performance sports cars and competitive racing cars. Dot5.1 has good oxidation resistance, has a high boiling point and is not easy to boil. It can withstand ultra-high temperature and has stable performance and a long replacement cycle.

Generally speaking, the brake oil needs to be replaced after two years of use. This replacement time will also be affected by the owner's driving environment and driving conditions. If the owner's driving environment is poor, and frequent sudden braking will shorten the replacement time of the brake fluid, if the owner's driving environment is good, and the vehicle is stepped slowly and lightly, then the use time of the brake fluid can be a little longer.