Re: Capacitor oil

Richard Quick says: "Hydraulic fluid is typically glycol based. The glycols
are polar molecules and as such are not suited for use in this application."
 While there are water-glycaol based hydraulic flids, typical hydraulic oil
is definitely pertoleum oil.  It does have antiware and corrosion additives
which could affect it electrically, but would certainly be worth a try in
capacitors, these being similar to motor oil additives. It is non detergent
and at the local gorcery was $12.95 for a 5 gallon bucket.    It's viscosity
is measured in Saybolt Universal Seconds (SUS) and S.A.E numbers.  S.A.E is
the measurement at zero degrees F. and 210 degrees F. , giving us things like
10W30W.  Anyone who has worked with typical hydraulic machinery know it is
petroleum based after they inadvertantly get covered with it!!  You have to
go out of you way to get glycol based flids, and they are primarily used
where fire is a great hazzard.  There are also water-oil emulsions and
syntehtic fire resistant liquids.  All of these are special request and
expensive.  If it is cheap, it is petroleum.  If it doesn't smell like oil
and feel like oil it probably isn't.  All petroleum products are influenced
by their crude oils unless refined to a specific product, such as benzene or
naptha and sold as chemical products.