08' gsr with 9,000 miles and the brake fluid is already low. The car manual says dot 3 or dot 4 approved, but will just any brake fluid do? I don't know if its a great idea to top it off with Mogul, since I'm unsure if Mitsubishi puts synthetic brake fluid from the factory. Anybody help me out?

 

DOT 4.

if your fluid is low, you may want to check your pads for wear. especially if there is no visible leak.