LOL......Never said that. The Rusty calipers and wheel cylinders that I have seen were all from Dot 3 systems. I have never seen any components from a Dot 5 system to compare. I guess where this all started, I read an article that said said the K/H calipers were less prone to problems if using silicone based brake fluid. I wasn't sure of the validity of the article that's why I am asking for opinions.