That is to say, one cylinder is bad.

#1 110
#2 115
#3  70  (went up to 80 when I put oil down the cylinder)
#4 112

So, uhhhhh, what exactly does that mean?

And what action should I take?

Thanks for any help I get,
...Markus

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'66 "rough looker, ball-jointed, hackjob skylit" Westy aka "The Tardis"  
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'74 "gotta new top!" Thing 
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