Scott, that is weird to me that you had more problems using the Ford HD brake fluid.
In my experience in 02-03, I had my car on 4 tracks, probably 1000 track miles, + 20 autocrosses, and I think we changed the brake fluid maybe 2x. Using the EBC greens front & back. (Right Dean?)
I had one instance in that entire time where the pedal felt spongy, I had the brakes bled, and all was back to normal after that.
Could it be that your brake system is aging, and hoses have expanded and contracted so many times that, like a balloon, now the contracted size is no longer original diameter, thereby allowing something extra in the system after a day of autocrossing?
I also wonder if the force used to brake varies by individual, affects wear long-term? That is, I press the brakes to stop but I don't stomp on it -- whereas I've seen other people stomp on their brakes in order to stop on a dime -- is this more wearing on a brake system?
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