My local Porsche specialist suggested to go with AP 608 brake fluid instead of ATE Super Blue. They claim the ATE stuff isn't really that good and stated that regular Dot 4 should be fine for daily driving while the AP stuff better for DE and racing. I'd really have no problem with their suggestion BUT the AP stuff is $29 a bottle

Any thoughts?

-Puma

 

The ATE blue is good up to 536°F
The AP 608 is good up to 608°F

If your brake fluid is going over 536°F you might just need to get the AP 608 .

 

Gang..

Does anyone think AP 608 might be better for the psd and and hydraulic system? How many fluid oz in a bottle?

Tobago Bob

90 C-4 Slate Grey coming out of paint shop on tuesday (two weeks late)
Pictures coming

 

I use it for racing my vintage Fiat and can attest that it will not boil at temps over 500 degrees! Don't ask....

If you are racing I would recommend it. If not, too expensive.

Steve

 

Boiling point is good information, but what about water absorbsion, lubricity, corrosion protection for metal parts, and compatibility with the rubber seals? Changing fluids is usually not a good idea unless you do a thorough flush, and change all the rubber parts that contact the fluid. The rubber is conditioned (ie, damaged) by one type of fluid, but the damage is stable as long at the same fluid is used. Changing to a different fluid risks problems with seals that now have to absorb new chemicals. Mixing two different fluids sometimes creates problems like viscosity change, or even chemical reactions.

Stay with the same fluid unless there is a really good reason to change. Your mechanics sound like they get a great mark-up on the fluid they recommend.

 

Try Castrol SRF.
Yes, it's $70/can, but everytime you reach for your brake pedal, your brakes WILL be there!
Dry boiling point matters in the can and in the car for maybe a week...after that the more important specification is wet boiling point.

Do a search over in the DE/Racing forum, lots of good threads, along with specs, for just about every brake fluid known to man.

 

Not sure about this but maybe. I've looked online for pricing on AP608 and they all seem to run about this price. They're a mostly a race shop with extensive racing background and seem to suggest/recommend based on race experiences. I'll keep looking into this. It just suprised me they called ATE Superblue "crap".