After putting hundereds of hours in paint on a restored car, I wouldn't use anything but dot 5. Especially considering the latest one had a leak and had I used dot 3, I'd be repainting the inner fender, frame rail, etc...

I have used it in 2 cars, both manual disc cars and I didn't notice a soft pedal or have any issues. It's not cheap, got the small bottle, they sell quarts also and it was 13 bucks, quarters are 25 or so. But small price to pay over repainting!