I need to flush my system. The truck has 73,XXX on it and brakes feel like they have never been flushed. Anyone running DOT 4 fluid in their's? I have used it in my Subaru and Lightning before (Amsoil 600 DOT 4 fluid to be exact). Any thoughts on this? Thanks!

Rafal

PS. How much do I need to a full flush? Thanks!

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