Have read many of the posts in this forum over the years and it's always proven useful and informative....helped me out quite a few times figuring out the issues...
This last issue surfaced as I was changing the plug and wires earlier today - thanks to the posts I knew what to take apart to get to the plugs and was done much quicker than anticipated.
When removing the wire boots on plugs # 1 & 4, both were coated in engine oil - and so was the external part of the plugs, not sure if there was oil inside the boots before I pulled them out or if the plugs were just coated as a result of removing the boots.
Not sure if this is indicative of any issue to watch for or fix as my searches did not yield similar problems...
After taking care of a few codes (O2 sensor, misfiring in #4) by replacing sensor and a new set of wires and plugs (OEM and NGK as recommended here), engine is running smooth and no other signs of issues (no oil dripping from car, not visible signs of burning oil)
2001 Legacy L Wagon
Manual
160k
Patrick