Not Ranked
Rob---thanks for understanding and your patience with the contest
Chas----over the years---I have seen dozens of times where a braking system break down was caused by the brake fluid and brake components being incompatible---always dot 5 was the fluid---it IS NOT friendly with most standard brake system seals, o-rings, etc, and causes inumerical problems----they need to be dis a ssembled, cleaned with solvent, dried/replaced, lubricated with proper fluid that is compatible and reassembled.
Further---Dot 5 was developed for the military for use in equipment parked on that island in the Indian Ocean ( Dago darcia????) it is not supposed to absorb/mix with water----which dot 3/4 does, and then dot 3/4 has its boiling temp lowered like from 600* to 500*f which as racers we know is a NO NO---Dot 5 doesn't mix with the water that collects in the brake system so the boiling point of the DOT 5 isn't lowered!!!!! good deal, right????HOWEVER, the water that is collected in the system does boil, and at 212*f-----which do you want????
And the DOT 5 has a compressibility problem that 3/4 doesn't have, and dot 5 in a vehicle at sea level taken to higher altitude ( Bonneville, Denver, Salt Lake) will bubble and act just like the system is full of air!!!!
So--- if you like DOT 5---use it--but don't mix it, change it, flush it with 3/4, or really expect the brakes to be there everytime you need them.
One other thing---read on here how many BDR's have ongoing and re occurring clutch problems----DOT 5
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