Is it OK to use DOT 3 & 4 fluid in the master cylinder reservoir of a 1991 Chevy Caprice ? Will it " mix " OK with the " older " specifications of brake fluid ?
Thanks ,
Wyr
God bless
Thanks ,
Wyr
God bless
BHopkins said:The only issue with Dot 4 is that it tends to be more hydroscopic than Dot 3 so you need to flush the fluid more often. Lots of cars from the 90's never recommended an interval although it was always a good idea as water will eventually rust out the the lines and other parts inside your braking system.
BHopkins said:The only issue with Dot 4 is that it tends to be more hydroscopic than Dot 3 so you need to flush the fluid more often. Lots of cars from the 90's never recommended an interval although it was always a good idea as water will eventually rust out the the lines and other parts inside your braking system.
Thanks. It's one of those words that's not in spell check and I was too lazy to look it up.
As for flushing the fluid every few years, the higher you go up, the more frequently you're supposed to do it. Even though it's a sealed system, it naturally absorbs moisture through the rubber and through the calipers just from heating and contracting.