Originally Posted by Scott Larson
Yous guyz really oughtta try the Marvel Mystery Oil soak! When your VX has some down-time, (couple-o-days) remove the spark plugs and pour a couple of ounces of MMO down each cylinder and rotate the crank a few times and then let it soak for a few days. Replace your plugs and fire it up and let 'er smoke! Replace your plugs with a fresh set and see if that clears your plugged oil return holes. It absolutely frees sticky rings so I can't see how it wouldn't help unplug those pesky oil return holes...
Doing this over the next couple days. Just put the MMO in a few minutes ago, and the truck'll be sitting for 72 hrs. We'll see what happens. Currently going through about a quart every 3K miles.
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