Worn forever, about 40,000 miles on a 1994 Acura Integra with slotted rotors. Look, I beat this car to death, it's my work truck. It's always overloaded with tools and I drive very, very hard. To the point where I NEED it. I've made them disappear 1 time, on 4 starts from 100+ mph to 0 mph and pedal stops, with the car fully loaded (late for work) and they disappeared a bit at the last stop but still stopped me. I have 35-40k miles on it, 25% left. Oh, and I got my rear brakes working for the…