Yes you can. Simply put, DOT4 is a premium version of DOT3, and they will mix. A lot of newer vehicles spec DOT4 in the brake or hydraulic clutch systems, so check to see what your specific application calls for. Quick side note: DOT5 brake fluid is the one that WILL NOT mix with DOT3 or DOT4.
It is a castor oil based brake fluid. Do not mix with systems requiring Dot 3 or Dot 4 which are glycol based.
BRAKE FLUID DOT 3 IS WHAT IT CALLS FOR You can use dot 4 also but never dot 5, it is silicone based and will not mix, it is for racing only.
DOT 5 is best, do not mix or use dot 4 or dot 3/
DOT 3 brake fluid
DOT 3 brake fluid.DOT 3 brake fluid.
There are three kinds of brake fluid in auto parts stores that you can use: DOT 3, DOT 4 and DOT 5.1. (There is also a DOT 5 "silicone brake fluid" the Army uses. Don't get that.) All Japanese cars contain DOT 3 fluid. DOT 4 and DOT 5.1 fluids can be put in the car if you have to - the three will mix - but DOT 3 is the most common and it's what I'd use if I was doing a fluid change.
DOT 3 is a type of brake fluid
DOT 3 brake fluid
DOT 3 brake fluid
DOT 3
DOT 3 brake fluid
DOT 3 brake fluid