Ever done a UOA on this oil, though it won't tell you any more than what the test looks for.
Strange notes on odor (never delt with aviation fuels/lubricants - all this interest is in maintenance and hobby I suppose!).
As for using it in an automobile, I would be concerned about seal compatability as well as any differing metalergy in reguards to protection gains or reactive losses.
In all honesty,
. I wouldn't use it unless it was the last lube available and a change was necessary, just to play it safe.