Went to book my ST in for a service today at my local dealer and the geezer said that the brake fluid should be changed every 2 years on the ST. Is that a con for an extra charge or has anyone else been told that or had it done????

its a reccomened thing but you dont have to do it. Brake fluid can absorb water over time so becomes less efficient it really depends how hard your drive the car i would say

Yeah its a hygroscopic fluid that absorbs water from the ambient air. As a result the proportion of water rises continuously over 2 years and the boiling point is lowered. Thats why at regular intervals must be meticulously observed. The dry boiling point relates to brake fluid without water, the wet boiling point on the other hand is more important because it takes into account a certain amount of water (about 3.5%)

Water absorption lowers the boiling point so brakes heat can boil the fluid into a vapour, which is compressable, leading to loss of effieciency and brake fade. Water can also cause internal corrosion of the metal components and deterioration of the seals....

Also it maintains your full service history as it will be stamped in your service book under the scheduled maintenance section.

I had mine done though it's not obligatory as part of the service schedule, it's included as an option. My car had sat about a lot for the first year before I owned it so I thought I'd have it done as a precaution.

It's a recommended procedure for all cars though very few have it done. I suppose in general use, the fluid will never get that hot, but for a sporty vehicle likely to be driven hard it is worth it.

If you joined Ford Protect, its included every 2 years, as is the services. only £255 for 2 years or £280 if your not an employee.