Suzam Posted September 21, 2010 Share Posted September 21, 2010 Which one or will both work correctly in a 97 Legacy L? Link to comment Share on other sites More sharing options...
Fairtax4me Posted September 21, 2010 Share Posted September 21, 2010 Either will work fine. I think the only major difference is Dot 4 has a higher boiling point. I always buy the Valvoline syn power stuff since it's usually on sale when I need brake fluid. Link to comment Share on other sites More sharing options...
OB99W Posted September 21, 2010 Share Posted September 21, 2010 While DOT 4 has a higher boiling point than DOT3 when uncontaminated, water more quickly reduces the boiling point of DOT 4. If you're good about changing brake fluid on a regular basis, DOT 4 is probably a better choice. However, if you only change it when there's a brake problem, DOT 3 could make more sense for you. Link to comment Share on other sites More sharing options...
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