My O-360-A1A sometimes shows a light film of oil on one or more of the
bottom spark plugs but never any on the top plugs. From what I have read
this is a pretty normal situation. Oil on the top plugs can be cause for
concern.

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Best Regards,
Mike

http://photoshow.comcast.net/mikenoel

wrote in message
ps.com...
Hi:

Looking at a PA32-260, with a IO-540 in it, 1500smoh. Prebuy reports a
couple cylinders in which there is oil on plugs. Compressions are good,
engine runs good. Mechanic doesn't seem too upset by it. Says that is
normal for this type engine. Should I be concerned?