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Old 11-26-2019, 07:56 AM   #48 (permalink)
Xist
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Location: Show Low, AZ
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Chorizo - '00 Honda Civic HX, baby! :D
90 day: 35.35 mpg (US)

Mid-Life Crisis Fighter - '99 Honda Accord LX
90 day: 34.2 mpg (US)

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90 day: 35.39 mpg (US)

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Some users have reported entering lean burn easier with MMO. If so, it could provide a greater increase than for other vehicles, but I would want to see testing. Project Farm compared it to Seafoam:

MMO seemed to clean better, but reduced compression. Now, the piston travels a set distance, while carbon can shrink the chamber, so I guess that compression tests are not the most important factor.

Shouty says that it is great for soaking parts, but not for adding to your gas:

Of course, Shouty does not like Seafoam either:

He says that you should use something like Chevron's Techron (or fill up at Chevron). He did say that MMO worked in old cars and I believe that yours qualifies. It does not have the newfangled technologies that he said are incompatible.
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