Have a look at the right side of any page on this site for the Google custom search box. Its at the top of all pages. Type in some key words there like rad fill or rad flush or coolant etc. There are already lots of posts on the subject. I can tell you for certain your question has been asked before because I have seen it. Read through an existing thread, especially one with lots of replies, and if you still have questions, post them there. People subscribe to threads so adding to an existing thread will get you more responses and faster than starting a new thread. Hope this helps..