Hi Ian,
There was recent discussion here on Shell 98 containing a much higher level of
unstable volatiles than BP (from Rob I think). We have been trying to use BP 98
in preference.
I would imagine that aside from the fuel line staining you are experiencing
that with such deposits building up over time this cant be good for the whole
fuel system especially carb and electric fuel pump components, let alone the
possibility of any long term chemical reaction with materials.
Regards
Laurie Hoffman
SYDNEY MOTOR GLIDER FLIGHT GROUP
On Thursday, 19 December 2013 7:29 AM, Ian Mc Phee <[email protected]> wrote:
I am wondering if others in Australia are seeing a change in 98 fuel. Ours
comes from Brisbane and I think is from Shell but for past 3 months has a very
dark brown stain and more recently there was one lot with a deep orange colour.
The issue is this new "stain" in 98 fuel really stains even correct German
(with release note) clear fuel line and within say 6 weeks makes the tube a
very dark brown and you can not see fuel in tube.
Also recently Jabiru Aircraft have said DO NOT USE SHELL 98 in Jabiru aircraft
which have fibreglass tanks as it is reacting with the fibreglass tank. Jabiru
now say use 95 or Avgas even though most Jabiru s require 96
My concerns is this will show up in Turbo and Motorgliders like Duo and Arcus
in the plastic tubes in the LHS of rear seat and may react with motorgliders
like PIK 20 which have glass tanks.
It could well be other states are not having an issue but think it is worth
keeping an eye on and can send photo to anybody who asks. All this has come in
over the last 3 months or so.
Ian McPhee
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