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I would say yes.
It says it is backward system compatible but you will not get the full benefit of the higher boiling point unless you do a complete system brake flush.
Every two years a flush is recommended with older style fluids but many people don't do it on that tight of a schedule.
Even I cheat the time line in between by sucking out the reservoir and topping it off and letting it go about twice as long or equal to what those "lots of people" do by "accidentally on purpose!"
When it comes to brakes you want to feel guilty about not doing your due diligence or suffer the consequences!
If you are needing to add fluids "to anything" you have to think where is it going?
In my way thinking, if I can call it thinking, I want to stay ahead of my oil, coolant and brake fluid.
In thinking about molecules of brake fluid will absorb moisture from surrounding moisture whether it's in the bottle or in a system. Call it by osmosis, if you want, it happens.
These bigger bottles are more economical but You got to keep your bottles tightly sealed and what out for how many years you had them opened. Use the oldest stuff to do flushes and switch to the newest stuff near the end.
By doing the replenishing thing, I keep my stock fresh.
The theory I'm depending on is, Heat from the brakes will vaporize or drive moisture away from the coldest ends of the system. Heat from the engine compartment drives it back the other way. Adding in the operation of the brakes you get motion inside the system. It has to happen!
By taking out the "largest amount of fluid in the system from the reservoir" this removes moisture by that quantity, by estimation probably 40 to 50%, that can reset the clock by a year.
The estimation on my part is the fact I keep adding fluid a couple times to get the lines to run out with clean new fluid.
Doing a brake flush it still mandatory as fresh fluid keep seals pliable and any rust particles smaller so they will move out of the system.
It's the bigger chunkier ones you don't want collecting around in there that score Pistons and lift sealing surfaces.
As far as the DOT 5 fluid I think the jury is still out if it's worth it, unless, you are a racing type brake user.
I don't hear to much about it, but then my circles, that I run in are limited in size! (:) sometimes I think I see my own taillights!
Phil
Hey Art I just caught your post with that link inside it!
I will have to read it more and think about my newly acquired 1993.
The PO said to me many times that her mechanic said she had 50% left on the pads.
The fluid looks fresh but I have noticed that the brakes feel slightly different than my 1991.
My wife recently drove it and she says she noticed that the brakes did not work as well when the transmission was in neutral (stick shift) while braking and coasting down a driveway of a friends house.
I humor myself with the neutral thing but now I have thoughts about the possibility of who put what fluids in when. I have yet put the car on the lift but I know I will be the replacing struts.
The car performs really well but the clunk of the struts was her greatest downfall of me paying the full price that she wanted.
Have a nice day!
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