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1983 300SD
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Discussion Starter #1
I'm planning on doing an MMO soak to see if it will help the smoke coming out of my crankcase. There was no blowby when she was parked two years ago. My understanding is that could be a stuck piston ring which is the primary use case for MMO.

I'm taking my Jeep to Moab for a week and a half and TBH the car doesn't need to run anyway. I'm thinking of just putting some in tomorrow and letting it chill in there until I need to fire up the car. Will leaving it in for longer than a week possibly do any good? Could it conceivably hurt? She'll likely be going into the new shop for paint after the new year and the engine doesn't need to turn over until then.
 
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