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Marvel Mystery Oil

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Old 07-15-2010, 05:30 PM
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Default Marvel Mystery Oil
Can MMO be used like some other combustion chamber cleaners like Sea Foam and Berrymans, i.e., by carefully pouring it into the carburetor while the engine is running, without harming the CAT or O2 Sensor?
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Old 07-15-2010, 06:02 PM
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If it doesn't say to do it on the directions, I wouldn't do it. Seafoam works great!
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Old 07-15-2010, 06:25 PM
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god i love seafoam!! and thats all i gotta say
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Old 07-15-2010, 06:34 PM
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MMO is for the Crankcase not for the intake.
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Old 07-15-2010, 10:38 PM
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You can add it to the gas tank. I did it on a 1987 nissan one time, never ran the same again. Stick to seafoam
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