Kitfox manual says to use Mil-5606 for the brake system. This is a high quality mineral based aircraft hydraulic fluid.

Van's has quit selling the 5606 for their brake systems and are now using Royco 782, which is a synthetic fluid. They say it is compatible with systems using 5606, but you must flush out the old 5606 first. The 782 has much higher temp rating and I am tempted to use it. Has anyone used the 782 in their Kitfox? Opinions? Problems?

Jim