How can I tell whats in my rig? It supposed to be dot 5 silicone. Its discolored muddy brownish colored. I have heard silicone smells like cow poo. Is there any other way to tell before I spend 24 bucks a pint to flush this thing? If I put silicone in a regular system, I'll end up having to replace all the rubber. That would pretty much suck big time... Anybody got any tricks?