The idiot light for my brake system, not the ABS, kept coming on when I stopped hard so I thought the cheapest fix to try was to add some more fluid. My owner’s manual calls for DOT3 but when looking at the wide array of choices at WallyWorld I saw DOT4 had higher boil off specs than DOT3 and was a…

Can I mix DOT3 and DOT4 brake fluid

texases February 1, 2010, 5:12pm 3

Yep, no problem. DOT4 is different than the silicone-based and incompatible DOT5 fluid, I don’t know if DOT4 is ‘synthetic’, but it’s compatible with DOT3.