DOT5 and SYNTHETIC are NOT the same thing.

DOT5 is a SILICONE brake fluid... there are many DOT4 and DOT5.1 "synthetic" brake fluids like Valvoline, Motul RB600, etc. etc. that are excellent fluids.

DOT5 is only recommended for use in show vehicles as it is not a very good brake fluid, it's primary purpose is to be very paint-friendly for ultra-expensive irreplaceable cars.


DOT5.1 is the best fluid type out right now.. the Motul in particular is excellent. Their "wet" boiling points are much higher than previous types and dry boiling points can exceed 700F.