History of my spark plugs with a leaky number 2 ring set.
 

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Still can't get proper sealing on my rings. Burning 1qt in 300 miles. And most of it seems to be in cylinder number 2.

The history of my plugs tells the story. Number 2 keeps fouling. Leading to rough sounding idle and wonky sound at light throttle especially at 3000 rpm.

Plus smoke. White-blue and toxic smelling. Variable too. Seems if I burn off the oil the engine runs nice. But low power seems to let oil back in fast enough to refoul the plug. Every start has a big cloud of smoke. Even if I shut the engine off and wait a couple of minutes.

That must be the fouling causing unburned fuel to dump into the exhaust.

Plugs numbered 1-6, left to right.