Low Compression in one cylinder

[RumHam26]

Just an update - I did the seafoam treatment through the pcv hose and it seemed to improve my compression considerably on my two lower cylinders. #6 is up to 195 from about 150, and #4 is up to 185 from 175. My hope is that it freed up some sticky rings

 

[HiLife]

Glad the seafoam worked to unstuck your rings. Just wondering, do you have more than average of carbon sludge inside the engine from oil being past it's useful mileage span? I would do a couple of quick oil changes to further clean out the sludge if you do.

 

[RumHam26]

Glad the seafoam worked to unstuck your rings. Just wondering, do you have more than average of carbon sludge inside the engine from oil being past it's useful mileage span? I would do a couple of quick oil changes to further clean out the sludge if you do.

I'm not sure really. My runner is just short off 200k, and since I've had it (from 75k) I have been pretty good about keeping up with the oil changes. Also - I haven't added seafoam to the oil itself - just through the pcv hose. In any case, I may take your suggestion - it certainly couldn't hurt.