Brake Fluid Choices

DOT 5 is good for show cars and cars that aren't going to be doing a lot of performance driving. I've been trying to figure out what to put in my new system and from what I've read is if you're going to be putting alot of stress on the brakes its best to go with a Hi Temp DOT 4. The silicone stuff doesn't absorb water so the moisture that does accumilate in the system tends to end up in the calipers and causes vapor lock in Hi temp situations. Silicone also compresses more than regular brake fluid. I got alot of the info from Wilwood and guys who autocross and road race. If you do go with silicone, bleed your brakes every now and then to keep the moisture out of the calipers and wheel cylinders. I was planning on going silicone because it seemed so harmless to the paint, but I'm using all Wilwood calipers and plan on running hard so I guess its Hi Temp DOT 4 for me :(