Michael, what do you want me to document -- that there are differences in chemistry? From whence do differences in boiling point arise? David has already stated that Chevron considers DOT 4 to be a replacement for 3. I know that owner's manuals I have specify one, not the other. I'll see what I can find stating that there are chemicals in one that are not in the other. DMc ---- Michael Snow <slowmachine82@GMAIL.COM> wrote: > On Thu, Aug 19, 2010 at 4:21 PM, Dave Mcneely <mcneely4@cox.net> wrote: > > >I may be wrong (never happened before ;-) ), but I think there are some incompatibilities in >materials, such that chemical interaction, or lube problems may occur whenever 4 is >substituted where 3 is specified or vice versa. There are some differences in chemistry, >hence the different names. > > Please cite any credible source (brake fluid manufacturer, DOT > standard, etc.) to support this assertion. This will live forever in > the list archives and create confusion where there should be none. > > -- > Michael Snow > 1987 Syncro TiiCo > 1982 Westfalia 1.9TD > http://slowmachine82.blogspot.com/ -- David McNeely |
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