Regardless of the brand of coolant, it needs to be mixed 50/50 with water. However, I have a concern. If you are getting white smoke from the exhaust, that means there is coolant getting into the combustion chamber and burning with the gas. It sounds like you have a bad head gasket.
What you need to do is check engine compression. Chances are you will find one of the cylenders has lower compression than the others. Here is a how to for checking compression:
https://www.2carpros.com/dia/how_to_check_compression.htm
Let me know what you find or if you have additional questions. Also, if you need the compression gauge, many parts stores will lend or rent them to you.
Thanks for using 2carpros.com
Joe
Thursday, July 9th, 2009 AT 5:34 PM