It's time to change my clutch fluid, I know how to doit, the question is what fluid is the best to replace the factory fluid???

Whatever I'm using for the brakes. Most advertise they exceed DOT 3 and 4. I track my car, so it is usually a 500 deg + dry-temp fluid. Many swear by Motul and the like, but they're a bit pricy if you're changing it often. I've used Valvoline V-Syn successfully and I have Johnsen's synthetic in right now, both relatively inexpensive. I'm told that the blue oval (Motorcraft) makes a really good, high-temp, cheap synthetic fluid. May give that a try. Good luck. I'm interested in hearing the experts myself . . .

FM

Castrol SRF both brake and clutch

I used WilWood 570* racing brake fluid and had good results so far...

Dot 4 synthetic brake fluid.

Motul 600

Numerous track days with Motul in my C6.

Never let me down.

Wilwood EXP 600 Plus Dot 4

Don't use DOT 3. Only use DOT 4 brake fluid for the clutch.

I use Prestone DOT 4 ($5 for 16oz bottle). You can buy it any AutoZone or O'Reillys. You have a number of brands to choose from. I'd stay away from the GM brand. Not cause its bad, but cause you get a 12oz bottle for like $12-$14. Might as well get more for you money using another brand.

I've been using the Valvoline synthetic; seems to work fine and its fairly cheap and easy to get. As far as I can tell good fluid changed
frequently is probably better for this application than great fluid not changed so frequently.

Motul RBF 600 Clutch and brake... I believe that wilwood is the same thing.

Same here. Was flawless with changes before and after each track event since new....until I put in a cam. Then I had to remove the pedal spring or the pedal would hang down after 1-2 shift. Without spring it works fine, though after the run it feels spongy - works, but feels spongy until I pump it many times on the return road.

Just like Ranger advocates, I use Prestone DOT 4 in the clutch.

I use Motul RBF 600 for the brakes.

Bob

Motul RBF 600 for both brake and clutches, don't feel like having 2 different brands for each.

I use Motul RBF600 for brakes and will be switching to that in my clutch as well, due to overheating of the stock fluid.

I am using Motorex Dot-5.1 Brake Fluid.