Correct brake fluid for a 1973 2.0? Options

[NJ914Guy]

I need to replace the cap/seal on the break fluid reservoir; have some weeping into the top catch area and the rubber seal on the cap is bad (no fluid on the floor inside the car). There is still plenty of fluid in the master cylinder reservoir and the breaks feel great! So I think I caught it before air entered the system.

Before replacing the cap/seal, I want to top off the break fluid. Any recommendations for what type of fluid to add? And is it OK to mix & match with what's already in there?

Thanks!

-Chuck

[realred914]

any DOT3 or DOT4 fluid will work for you, it is advisable to flush out the entire system every year or two. two full quarts seem to do the job fine, use a bunch more on the passenger rear side a little less on the driver side, then a bunch more on the passenger front,and a little less on the driver front. this usually uses two quarts for me. If the car has really dirty fluid, I soften repaet the process. besure to syphine out the old fluid from the resevoir first, thus preventing mix of old and new fluid as you top it off.

also do not top it off unless the pads are new, if you top it off with worn pads, then later replace the pads with new, the fluid level will go up, and could overflow

vavloline synthetic or castrol LMA are my two favorites for my modern cars like the 914

on my classic cars I tend to use silicone fluid (DOT5) but using that requires a complete rebuild and replacement of ALL rubber parts if they were used with DOT 3/4