Has anyone used this before and is it compatible with standard brake fluid?

My wifes van has a leaky wheel cylinder and she bought a 1 quart bottle of Prestone Synthetic Dot 3 brake fluid. Now before everyone starts telling me I need to replace the offending wheel cylinder, just let me say...DUH! I will be a full brake job on it tomorrow. I'm just wondering how compatible the synthetic Dot 3 will be with standard Dot 3. I've never heard of synthetic Dot 3 before. I thought all synthetic brake fluid was Dot 5, which can be used, but you have to flush the whole system of the Dot 3 first. This bottle says can be used in all Dot 3 systems.

So what do you think? Will I be ok? Or should I take it back and get a bottle of regular brake fluid?