This is easily the best fluid out there. It doesn't destroy your seals, it's boiling points (including the critical WET boiling point) are far superior to any other product and it comes in a cool metal can. Buy it from Dali for $60/liter.

I completely flush my brake system every spring and suggest you do the same. SRF for the brake side, factory fluid for the ABS system. I was having some ABS "noise" issues until I started flushing it once a year. Now the damned pump doesn't run forever!

Want to know how to bleed your brakes? See how Dano does it.

This is from the Castrol Site:

Castrol SRF is less hygroscopic than conventional brake fluids - it absorbs less water in a given time. Unlike conventional glycol ether fluids, Castrol SRF reacts chemically with the absorbed water to reduce its adverse effects, thus preventing the fluid's high-temperature performance and safety margins from deteriorating as rapidly as they would otherwise do.

Castrol SRF exceeds the US Federal Standards FMVSS 116 DOT 3 and DOT 4, ISO 4925, JIS K2233 and current SAE J1703 and is miscible with all conventional brake fluids conforming to these standards. However, mixing Castrol SRF and conventional brake fluids will reduce the benefits of Castrol SRF. It is strongly recommended that conventional brake fluid be drained from the system before flushing and re-filling with Castrol SRF.

The wet boiling point of Castrol SRF, 270 C (518 D), is vastly superior to the minimum requirement of 155 C (311 D) demanded by the current US DOT 4 specification. The product's typical dry boiling point of 310 C (590 D) is likewise outstanding. This ability to withstand temperatures in excess of 300 C (572 D), and its superior resistance to the effects of absorbed water, have established Castrol SRF as the world's premier fluid for the hydraulic brakes used in all forms of motorsport.

Want even more info? Then look at the facts!