Cheap DOT 5.1 Brake Fluid

[Colesy]

Found a seller on ebay selling DOT 5.1 brake fluid for ~£5 per litre including shipping, it's motorbike brake fluid but should be fine for cars too. He's got auctions with buy it nows for up to 12 500ml bottles @ £29.99 which is the cheapest I could find on the net. Useful if anyone is planning on bleeding their brakes.

[K7ERG]

Cheers will be doing this soon.

[driftin jo]

Don't be fooled into thinking this is good brake fluid because it is 5.1 as opposed to dot 4.
dot 5.1 has only a higher minimum boiling point than dot 4.
proper high performance dot 4 has a much higher boiling point than the minimum requirement for dot 5.1 .

you will find you cheap dot 5.1 has boiling points of
DRY ----------------------- WET
270 °C (518 °F) --- 190 °C (374 °F)


Were as high performance brake fluid such as Motul RBF 600 has boiling points of
DRY -------------------- WET
312 °C / 593 °F --- 216 °C / 420 °F

Bottom line is don't use cheap brake fluid.

[K7ERG]

Fair point change of plan.