Originally Posted by
Brendan
ok the DOT spesification is to do with NOT absorbing water, which boils under breaking as things get hot ... the steam in the system causes spongy / no breaking.
Breaking is converting kinetic energy into heat energy! so stopping a tonne plus of car from 150mph = lots of heat. castrol make somthing called SRF and it is supposed to be in a class of its own.
At £43 per Litre you'd want it to be
So when putting new fluid in does it matter if it mixes with old fluid in the lines or do you have completely drain it? and (how????)