Re: Modern Fluids??
Posted by Dave Kenney On 2008/8/1 7:56:45
Quote:
osufliboy wrote:
Thanks for the quick reply Owen, one last question though. I have no way of knowing what type of brake fluid would have been used in this vehicle. Is there any way to determine what is actually in the master cylinder (dot 3 vs. dot 4) or is just a shot in the dark. My wifes grandfather who I got the car from has since passed and there is nobody left to ask any history on the veh or the veh maintenance.
DOT 3 and DOT 4 are compatible and can be mixed so either will do. DOT 3 is probably what is in the car now as this is the most common type used in American cars. DOT 5 is silicone based and is NOT compatible with either DOT 3 or 4! Eric's test is tongue in cheek I'm sure but valid in the sense that the DOT 3 or 4 will stain or even lift paint so be careful not to spill it on a painted surface. I cannot tell you how to differentiate between DOT 3 or 5 but if you take a sample of what is in the car to a brake shop they may be able to tell you.
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