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Brake fluid - Mineral or synthetic
  • joe53HHjoe53HH
    Posts: 11Hitchhiker
    I want to flush out the old fluid from the brake system in my 53 Hornet. I know enough to stay away from the DOT-5 silicone fluid but I wonder what your thoughts may be concerning the DOT 3 & Dot 4 fluids. I see all contain various formulas of glycol but some are synthetic and others are mineral based. Your opinions will be appreciated. Thanks, Joe