Re: Dot 5 brake fluid
Here's some other information...probably useless.
I was once told that unless your brake system was specifically designed to use DOT 5, that it would eventually deteriorate the seals = leakage = no brakes. I don't know if that is true or not.
We know Dot 5 is incompatible with other brake fluids.
Dot 5.1 IS compatible with 3 and 4.
Now for the bit of trivia that prompted me to post. I was in need of some brake fluid so I could get a nice ride in before the next Monday, but I missed my local Honda parts department Saturday closing at noon by 10 minutes. Having searched all the local autoparts stores for DOT 4 before, and finding only one local shop had it (for exotics!) that was my only hope but I knew it also was closed.
Out of desperation I went into the Harley dealership. I'd never been there before and looked around with awe at all the Harley stuff for sale. There were even a couple Harleys and several Buells on the floor as well. I feigned club membership by looking at a VRod for a bit, and then I stood for ten minutes getting to the parts counter (there were a lot of people ahead of me, and there were three guys working the counter. Geez, I guess Harley owners need a lot of parts!)
Anyway, I get to have my turn and asked for some DOT 4 fluid and the guy just gave me a 15 second moment of silence while looking at me as if I were some sort of deranged alien being. Then he said they didn't carry it. "All Harleys use DOT 5. Didn't you know that????"
Suddenly feeling surrounded by tee shirt and vest shoppers, and very alone in uncharted territory I said "Er, no I didn't. Not that I doubt you, but I want to check my owner's manual before I buy some. Thanks, and have a great day!"
I then beelined it for the door and left the area post haste.
Maybe that's reason enough to avoid DOT 5???
Official Racer Dude Guy, according to a neighborhood 6 year old.