Quote:
Originally Posted by TurboBlue
Hey Moose,
Im still very new to all this information regarding brake fluids and I was going to be changing my brake pads soon. I was just wondering, is it ok to mix an aftermarket brake fluid with the OEM brake fluid? Any idea which brake fluid out there (not a racing brake fluid) has the same DOT or contents as the OEM brake fluid? Or is it best to just flush the whole system and add new brake fluid?
Thanks!
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You can do this and the DOT rating doesn't have to be the same (except for DOT 5, which silicone and not PEG based), as they are miscible with each other. However, it is best to use fresh fluid and flush to get the old fluid with the absorbed water out of the system. IOW, you need to do it anyway, so why not now? A good mechanic would probably charge you under $50 to do this and might even bleed and flush your clutch cylinder too.
I recommend Valvoline Syntech DOT4 and that's what I use. It's probably the best over-the-counter brake fluid you can commonly find at any chain auto parts store.