Brake fluid switch-best fluid?

[anp4god]

HI. I did a few searches but didn't turn up anything. I am looking to switch to DOT 4 fluid on my 99 'burb so I can minimize confusion at home. My VW specifies DOT 4. I didn't go through the manual or even look at the cap on the suburban, so maybe I'm asking a stupid question, but in any case, does anyone have any experience or suggestions on doing a fluid swap? And are there any negative consequenses I should look out for? I have thought about going to synthetic, but don't think it's necessary.

Thanks.

[crashz]

Not sure. For some reason I think I remember seeing something about them not being compatible, but I really can't be sure.

But I did notice your location. I hope you and your family are safe, fed and sheltered. I wish you and your country the best. I'm proud to say that we have friends down there right now helping with the medical situation.

[Robyn]

Do not swap regular fluid (DOT4) with the silicone fluid.

These are not compatible.

The DOT4 should be fine.

Some DOT 5 fluids are silicone some are not.

The basic fluids (DOT3, DOT4) are glycol based fluids and if you mix silicone fluid you get a mess.

[JohnC]

Right, 3 and 4 are compatible with each other. Neither is compatible with 5.