>      Ken Welter wrote:

      >    I used Evans NPG for a couple hundred hrs but I am now
using Sierra
      >    It worked fine but expensive and hard to find when out on the
      > victor air was but the main reason I switched is that it gels up in
      > sub zero temps and that worried me as I have flown with temps down to
      > - 30.
      >
      >    Ken

 Ken, Is that a standard water glycol mix? Serra is a trade name I am
 not familiar with. Bill Jepson

   Its a brand name for a propylene glycol, Prestone also makes one
but so far they are the only ones but they are all going to be forced
to switch for environment reasons.
  I use 40 water 60 Sierra mix, the Evans is also a propylene  based
coolant but you must run it 100 percent and cannot add water which
was a pain if I needed to top it off way out in BFE.

  Ken

 
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