I have used dot 5 for many years with no problems. I like it on restorations and cars that sit a lot. I have a buddy who has a large car collection, I have seen cars restored and sit for several years and the brakes go bad just sitting with regular brake fluid. Dot 5 will not eat paint and does not draw moisture. But as several have said I see many manufactures of parts not recommending it's use. I got a set of calipers for a corvette the other day and it said use of Dot5 would void the warranty. Not really sure why the bad press for Dot5.