What brake fluid

[haydey]

Hi, I have a 2005 cupra r, im changed all disc and pads for grooved one, im gonna change brake fluid, so what do I use dot 4 or dot 5 ? thanks...

 

[SlimsLCR]

Dot 4 is the most common type used, and probably what is being used in your car! Dot 5 will not mix well with dot 4 and could cause serious problems! Dot 5 is silicone based dot 4 is glycol based! I'm gona recommend you completely flush the system out and use Dot4, unless the manufacturer says different!

 

[Matt-V5-Duffy]

LCR uses DOT4 as standard

 

[Burnzybubbles]

Dot 5.1 is compatable and has a higher boiling point standard, but requires more frequent changes due to it being more hydroscopic, a good dot 4 fluid like ATE super blue will be sufficient unless doing lots of track days and don't mind the extra maintenance.