Ride is going better than ever bro.
The major change that i have noticed is that it reaches the optimal temperature quicker than before. Before it took near 9-10 minutes, now it reaches in 5-6 minutes. last year in june in lahore on mall road in extreme traffic and a/c on, the temp needle raised by two points on signal. After moving it came back.
Now Stress tested the car by driving it in extreme traffic and pushing it in initial gears with a/c on. The temp needle wont move.
Remember to drain the block too by removing that big bolt on block. It has green mark on it.
Technically you need a little more than 2 bottles but it doesnt matter that much. 2 bottles will do the job.
You can gather the water dripping from a/c and use it. If you cant, then get filtered water and boil it if possible. Or you can use plain old tap water. Its not a human that you have watch closely mineral intake that much 
But make sure that the water is not salty.
