Quote:
Originally Posted by Island_370
There are no safety issues with mixing DOT3, DOT4, or DOT 5.1 fluids. It is like adding 5w-40 to a motor with 5w-30. They have different properties and will change from being blended, but it won't hurt anything.
DOT5 brake fluid should never be mixed with the others.
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won't mixing dot 3 and dot 4 lower the boiling point for the fluid tho? He's going to be trakcing the car so with a lower boiling point, he will be more likely to cook the brake fluid thereby,
on the track, increasing the risk of having a brake failure, ie, a safety issue on track, not on the street.