On Mon, May 9, 2011 at 6:53 AM, davewillner <dwillner at ptd.net> wrote: > Is there a fool-proof method (other than replacement) to tell what type of > fluid is in a car?... it also may be 10 years old? If it is brake fluif and it 'may be 10 years old' then why not just replace it with whatever flavor you like? I like Goofy Grape. Geo