DOT4 brake fluid. Yay or nay?

[Kn38ms]

Had the Dealer flush the brake fluid.
I just noticed on the invoice they used Dot 4.
Cap on the master says use DOT 3 only.
What gives :shrug:

 

[mustangman36578]

dot 4 has same principals and properties, pretty much, as dot 3. it is fully compatible with dot 3 but better because it has a higher boiling point so if you have to hit the brakes hard from say 100mph and come to a stop you will have less brake fade. im sure the autocross guys will chime in with more info for you too. im sure most of them are using dot 4.

 

[3B99SVT]

Castrol used to have a DOT3/DOT4 brake fluid, but I can't find it anymore. I agree w/Mustangman in that the DOT4 isn't a problem. A while back I knew that DOT5 wasn't supposed to be mixed since it is/was synthetic, but the DOT3 I use (Prestone) is synthetic now too.