the post on MMO is interesting, and I've always wondered what the actual science is behind both that and SeaFoam. My favorite uncle, who was a mechanic all his life and also in WWII in Europe, had a shelf full of SeaFoam cans in his shop and swore by it. He specialized in marine (boat) engine work. One of my earliest memories of him, back in the '60s, were all those cans of SeaFoam stacked up.
And I've never heard anything but good about both of these additives. But I'm always a little suspicious of anything that is "good for everything", and both of them claim to work equally well whether added to the gas tank or the oil. Since the oil and gas have completely different functions, it is curious how these additives can really help, especially when added in a few ounces per tank (or oil change). Does anyone out there understand the "mystery" behind the Mystery oil, or the Seafoam? I still use 'em, just curious :- )

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