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Model A Ron · 03-30-2021, 05:12 PM

I have 82 Mercedes Diesel that had low compression. Someone told me to put some MMO down the cylinders and let it do its thing for a week. Long story short it must have removed carbon buildup because the compression jumped a lot and has remained strong for years

God Bless MMO

03-30-2021, 05:12 PM	#30
Model A Ron Senior Member Join Date: Feb 2021 Location: Troutman, NC Posts: 717	Re: Marvel Mystery Oil in Crankcase I have 82 Mercedes Diesel that had low compression. Someone told me to put some MMO down the cylinders and let it do its thing for a week. Long story short it must have removed carbon buildup because the compression jumped a lot and has remained strong for years God Bless MMO