Primarily for general aviation discussion, but other aviation topics are also welcome.
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By bilko2
FLYER Club Member  FLYER Club Member
#1876424
Does anyone know how UL91 keeps compared to 100LL?
I once had to use some 100LL from drums that had been under a snowdrift in E Russia for at least 7 years. Seemed to work ok, but I do have a quite agricultural Lycoming O360A
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