Ford Fusion V6 Sport Forum banner
1 - 13 of 13 Posts

·
Registered
Joined
·
346 Posts
Discussion Starter · #1 ·
Looking for a link to some good high temp brake fluid for out cars. No point of me installing better pads and rotors if I’m just going to cook the fluid anyway. I would prefer a recommendation based on somebody’s prior use. Thanks again.
 

·
Super Moderator
Joined
·
1,728 Posts
Did they change the fluid spec on the newer Fusions/MKZ's? My '17 requires DOT 4 LV fluid. Although DOT 5.1 is compatible as a replacement for the older specs and will have a slightly better boiling point. (As FunktasticLucky said, not DOT 5, only 5.1)
 

·
Registered
Joined
·
914 Posts
5.1 is compatible. It's propylene glycol like DOT4 is. But I don't know how much a difference you need. We are talking like 20-25C difference.

Sent from my VS996 using Tapatalk
But it last I looked all Dot 5.1 didn't meet the specs for viscosity stability that dot 4 LV requires. The abs system is also tuned for the thinner viscosity.

Also unless your using high temp race pads the higher temp brake fluid is pointless. Usually to get to where you need high temp brake fluid, most street pads would be far outside of the temp range and the over heated pads would be why the brakes would turn to mush.

Get dot 4 LV fluid and do yearly flushes to get it closer to the dry boiling point.

Sent from my Pixel 4 XL using Tapatalk
 

·
Super Moderator
Joined
·
1,728 Posts
No, regular DOT4 it's going to be more viscous than 4 LV.

Lower viscosity is OK, but a higher viscosity may negatively affect ABS performance & overall brake feel.

Sent from my SM-G986U using Tapatalk
 

·
Registered
2019 > 2018 > 2017 :)
Joined
·
316 Posts
I've been reading up on this topic for a while after boiling the Motorcraft PM-20 on a short track stint with EBC Red pads (not even Yellow or Blue). From my research (and said above) you could probably get away with just about any DOT 5.1 fluid as the viscosity is close to but not quite the same as DOT 4 LV.

FYI This site is a great resource on Brake Fluids:
Brake Fluid Comparison Shopping (lelandwest.com)

Here are my final choices that should work well in our cars and be a bit better than the stock PM-20.
MPNDry boiling pointWet boiling pointViscosity at -40°C (-40°F)
Motorcraft DOT 4 LV High-Performance Brake FluidPM-20509° F/265° C338° F/170° C750 mm²/s
Bosch ESI6-32N Brake FluidESI6-32N520° F/271° C360° F/182° C685 mm²/s
ATE Super DOT 5.1706602509° F/265° C356° F/180° C750 mm²/s
AMSOil DOT 3 and DOT 4 SyntheticBFLVCN-EA520° F/271° C368° F/187° C817 mm²/s
Motul DOT 5.1 Low Viscosity Brake Fluid100951522° F/272° C365° F/185° C820 mm²/s
TBM DOT 5.1 Extreme 6 Brake Fluid7-0102612° F/322° C400° F/204° C900 mm²/s
P.MU Racing BF6 DOT5.1 ISO:Class6521° F/272° C359° F/182° C900 mm²/s
Champion DOT 5.1 Brake Fluid4056K/12530° F/276° C356° F/180° C900 mm²/s
 
  • Like
Reactions: lyee
1 - 13 of 13 Posts
Top