while plugs may be well maintained, they can wear due to heat
or lean of peak operation etc., and that this may shorten plug life.
Pat
Assuming your engine runs smooth when LOP, LOP operation should
increase plug life, not shorten it. Plug fowling will be much
less likely, and assuming you are operating far enough into the
LOP range, the cylinders and plugs will be running cooler.
~Paul
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