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Hoses, seals and other rubber parts... (archive)

[ Follow Ups ] [ 7-series (E32) Message Board ] [ Msg. Board FAQ ]

Posted by Kevin on August 13, 2001 at 19:52:09:

In Reply to: Good point Kevin, so since Pentosin is a natural posted by Q on August 13, 2001 at 16:58:25:

Since we all have become acquainted with posts of the danger of putting non-pentosin fluids in the system, my guess is that the same seals that become enlarged by non-pentosin oils also tend to contaminate the pentosin with the effects of time, friction and heat. There are numerous rubber hoses even coming off the resevoir that look to me like viable contributors to a dirty filter.


product and not "synthetic", what would be its life expectancy and is the Pentosin fluid efficacy diminished over time? Hhmmm. Another question I have is...where does the build up of contamination come from? When I changed the pwr str reservoir filter, it was filthy and clogged. Hhmmm. Sooo many questions. Anyone want to chime in?

91 735iL

I never actually checked the composition myself, but I was told that Pentosin in mineral oil based, unlike brake fluid which is alcohol based, it should not be so prone to absorbing water over time.


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