Silicone Fluid?

[PoorManQ45]

I was reading a magazine article about Silicone Brake fluid vs. Standard DOT Fluid.

It said that the Silicone absorbs a minute amount of water compared to standard brake fluid.

Has anybody tried using Silicone Brake fluid in their Infiniti?

What are the pros and/or cons of silicone brake fluid?

[carlos_knology]

I think DOT 5 fluid is silicone-based. However, it's does not mix with the other types of fluids.

You'd have to do a thorough flush before using DOT 5 in a car which wasn't so-equiped by the manufacturer.

You could go to a fully-synthetic fluid (dot 4?) and you don't have the compatibility issue.

[Q451990]

I don't think DOT5 is compatible with the seals in other systems - flushed or not.

Heath

[carlos_knology]

Heath is right on that. I had forgotten about the seals.

I just remembered that they are not compatible to mix.

[911/Q45]

DOT 5 also has a big problem with air bubbles not clearing in the nooks and crannies.

[texasoil]

Why even consider it for the Q? It is not needed for even the most extreme Q service. You would melt the pads and rotots long before getting above fresh DOT 4 premium fluid. (I use Blue one flush, amber the next)

[PoorManQ45]

Well that's the problem. You said long before getting the Fresh DOT 4 to boil off.

Over time, the DOT 4 will absorb moisture that is in the lines. The more moisture it absorbs, the lower it's boiling point gets. That's one reason I brought up the Silicone fluid. It doesn't absorb moisture.

[Q451990]

Just check on that seal issue before pouring it in... Annual brake fluid flushes are the solution to the boiling point issues.

Heath

[Moto Man]

DOT 5 is for long service life, not high performance. You probably wouldn't want it even if it was compatible.

[PalmerWMD]

DOT 5 is not compatible with our cars braking systems.ValvolineSynPower DOT3/4 wet bp of 384F, dry bp of 502F wet.Its all you'll ever need.

Fred..