> I have just discovered that one of my cars which I thought had Dot 3 or 4 > actually has silicone and last month I topped off the master cylinder with Dot 4. > I am sure I am not the first to do that so what is the prognosis? I can > syphon off what is in the master cylinder but by now all sorts of mixing action > has occurred. > > Marv Answers to your questions are available from many good sources. I would suggest a Google search. Personally, I like and have systems with DOT 5 fluid in them. Does what I want; fluid stays clear and does not attract moisture like DOT 3, 4 do. I understood a long time ago that adding DOT3, 4 to a DOT5 system derates the DOT5 fluid but is 'compatible'. But the mixture of DOT3,4 and 5 is not desirable at all and can lead to a system with strange looking gunk in it. If I had a system with DOT5 that had to be topped off with DOT3,4, in an emergency, I would draw out all fluid from the master cylinder as soon as possible and flush and refill the system with straight DOT5 fluid. Brake fluid only is best to flush the system with and definately not alcohol (from my manuals anyway). Some hydraulic parts were never designed to work with alcohol (and NO brake part will live when contaminated with anything petroleum based). Warren Anderson Sedona,AZ ------------------------ Yahoo! Groups Sponsor --------------------~--> What would our lives be like without music, dance, and theater? Donate or volunteer in the arts today at Network for Good! http://us.click.yahoo.com/2xaSZB/SOnJAA/Y3ZIAA/8LmulB/TM --------------------------------------------------------------------~-> To send a message to this group, send an email to: Chrysler300@xxxxxxxxxxxxxxx For list server instructions, go to http://www.chrysler300club.com/yahoolist/inst.htm Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Chrysler300/ <*> To unsubscribe from this group, send an email to: Chrysler300-unsubscribe@xxxxxxxxxxxxxxx <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/