I know this is going to sound like a very very stupid topic, but I have a friend that is trying to tell me how supper important it is to flush all of the fluids in a car after like 60-70K ..... like radiator, trans, rear end... powerstearing, and brake system..... I was just wanting some other opinions.... I can see maybe the radiator, and the powerstearing, because since you are opening them you run the chance of letting in dirt and crap, but the other seem....a little over the top. so is he crazy, or am I just stupid?