Not sure if silicone fluid has the same effect on the hose life..but it doesn't need changing as often. Another question is whether the steel braided ones last better or are just the same on the inside?
In reality I think most hoses don't get changed until the outer casing show sign of damage or perishing, it's the only way they get checked on MOT's as far as I know.
I have had hoses look perfect with no cracking, but be blocked by degraded lining rubber.
Jon the Chief
