I typically use Mobil1, but I do like K&N. However, I do love to cut open oil filters to see what is happening in my engines.
It will be interesting to learn whether this engine can be drained using an oil evacuator as I prefer using them to other methods since they drain more oil. Any time I remove a drain plug I always replace the washer, AND I always use a properly calibrated torque wrench to put the drain plug back in—I never used any air tools on a drain plug; not even to remove it.
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