I've never understood what makes brake fluid synthetic, but I think the main advantage is boiling point of the fluid for high performance brake operation. Usually a fluid that is rated DOT 4 is better in that regard. Someone who travels in the mountains or drives aggresively would probably have better brake operation when things get hot, due to the higher boiling point. That being said, I use Valvoline's "synthetic" DOT 4 in everything that requires brake fluid, except my old 52 Ford Tractor. It gets DOT 3.
To answer your question, yes you can use it. Just make sure it is not DOT 5 or says silcone brake fluid since DOT 5 is not compatible. Your fluid should say DOT 3 or 4, and it's probably DOT 4 if it's synthetic.