if you had bad seals you would notice a puff of grey smoke exiting the rear muffler because the engine's oil is seaping past the bad seals and into the combustion chamber then igniting with the fuel and air mixture, producing the grey smoke. Have you ever thought that it could be dirty or clogged fuel injectors? Some additives at car shops can fix this.
My mechanic did the test for me so I don't know the exact numbers, he said it was definately the valve seals. I did a compression test myself not too long ago and all the cylinders were within 5% of each other but weren't that high like 160 or so. I didn't do a leakdown.
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