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harborman harborman is offline
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Join Date: Dec 2009
Location: SW MIchigan
Posts: 2,236
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Marvel Mystery Oil

I was working on my Jeep CJ5. I did a compression test and one Cyl was only reading 95 PSI, so I put a few Oz. of the Marvel in the plug hole and let it sit a few days. I did another test and it went up to 150. I drove the Jeep and it seems to be running better and I will do another compression test later. Have any of you guys ever used Marvel Mystery Oil? Your experiences with it?
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1986 928S
32 valve engine
All stock, automatic, 539 Weissgold Metallic, 70K original miles, Hankook Ventus 2 tires.
Previously owned: 67 Vette, 427 L88 Stingray, 74 De Tomaso Pantera L. Latest addition: 2000 BMW Z3 Roadster
Old 08-17-2014, 05:14 AM
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