RECENTLY MY FRIEND ADVISED ME TO CHANGE COOLANT OF MY CAR. I OWN A ALTO VXR. ITS MILEAGE IS 40K. I DON'T HAVE MUCH KNOWLEDGE ABOUT THE COOLANT. DO I CHANGE IT? WHICH COOLANT IS BETTER FOR MY CAR? NEED FULL INFO ABOUT THE COOLANT. DOES IT HELPS FOR BETTER PERFORMANCE. NEED HELP................