I think you're confusing the term "synthetic" with "silicone".nis350 said:is synthetic dot 3 & 4 brake fluid compatible with the regular dot 3 an 4 fluid? OK to mix?
The main advantage of DOT 5.1 is that it has higher minimum required boiling temperatures than DOT 3 or DOT 4, which means that it is more resistant to fluid boiling and resulting brake fade. However, you can get fluids such as Motul RBF600 that meet the boiling point minimums of DOT 5.1 but are classified as DOT 4.NSX-Racer said:Some recommend 5.1 for brake systems with ABS because it has lower viscosity so that the ABS could react quicker and it should be easier to get air pockets out of the system (bleeding).
Larry Bastanza said:NOTE: After a little investigation it is clear I have no idea what I am talking about. It appears that DOT5 is silicone based which will not mix. The ATE Blue/Gold which I have been using for years is synthetic and compatible with DOT3/4 fluids.
You can mix any DOT 3, DOT 4, or DOT 5.1 brake fluid with any other DOT 3, DOT 4, or DOT 5.1 brake fluid - regardless of whether or not it says that it's synthetic on the label.nis350 said:I was shopping for brake fluid and noticed some label as synthetic dot 3 & 4 and others do not have the 'synthetic' label. Not sure if all dot 3 & 4 are the same.