Castrol Brake Fluid Dot 4 is suitable for use in all brake fluid systems in cars, motorcycles, and light commercial vehicles (LCV’s) requiring either a DOT 3 or DOT 4 product (excluding brake systems where a mineral based fluid is specified). Castrol Brake Fluid DOT 4 is a synthetic brake fluid comprising of glycols and borate esters to achieve a higher boiling point and wet boiling point.

Castrol Brake Fluid DOT 4 is fully compatible with other fluids meeting FMVSS 116 DOT 3 and DOT 4. However, in order to maintain the superior performance characteristics of Castrol Brake Fluid DOT 4, avoid mixing with other brake fluids products.

Meets the requirements of the SAE J1703, SAE J1704, FMVSS 116 DOT 4, ISO 4925, JIS K 2233 and AS1960.1 specifications. The formulation has been developed such that the vapour lock point can be sustained at a higher level than conventional glycol ether based fluids during the service life of the product.

All conventional brake fluids deteriorate during use. It is strongly recommended that Castrol Brake Fluid DOT 4 should be changed according to the vehicle manufacturer’s advice. In the absence of such advice, a 2 year change period is recommended.