I'm about to change my brembo brakes with bbk but I only have 1.5 bottle of the super blue racing brake fluids. Is that enough of brake fluid to change the whole front and rear lines and if not can i just buy some different kind from pepboys?

 

Should be plenty, but Super Blue will mix with other fluids. According to the description "It is compatible with and will mix well with most DOT3, DOT4, or DOT 5.1 fluids."

 

first off... how old is the half bottle?
It's not recommend to use bottles that have opened for a while.

1.5 is cutting it close & depends on how much air gets trapped & the calipers.
I went through 2.5 installing my Akebono brakes before all the air was out.

 

Ya I bought 3 bottles of the motul 300 just to have extra for bleeding purposes. I used about 2 ish.