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Old 07-31-2014, 03:28 PM   #9 (permalink)
Cyborg ECU
California98Civic's Avatar
Join Date: Mar 2011
Location: Coastal Southern California
Posts: 6,297

Black and Green - '98 Honda Civic DX Coupe
Team Honda
90 day: 66.42 mpg (US)

Black and Red - '00 Nashbar Custom built eBike
90 day: 3671.43 mpg (US)
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Originally Posted by Old Mechanic View Post
I wouldnt try to clean any "gunk" off the rockers or use any solvent that could cause the valve seals to loose their integrity and you start burning oil. The inside of the valve cover, no problem....
Thanks, man! Will do.

Originally Posted by sarguy01 View Post
Well, I used Marvel Mystery Oil on my 200,000 mile Metro. If Seafoam is "colon blow", Marvel Mystery Oil is a "gentle cleanse". ...
I actually do use the MMO, sometimes. But not in the oil anymore. Two years ago or I did once and it made me nervous because it was associated with an experience of a quart of oil loss over the course of a 6000 mile oil change cycle. It might not have been the cause, but it put me off the practice. I do put a little in the gasoline sometimes. Maybe I'll use MMO for cleaning the inside of the valve cover. That sure would be gentle. But I think I'll lay off the rockers and such, as Old Mech says.
See my car's mod & maintenance thread and my electric bicycle's thread for ongoing projects. I will rebuild Black and Green over decades as parts die, until it becomes a different car of roughly the same shape and color. My minimum fuel economy goal is 55 mpg while averaging posted speed limits. I generally top 60 mpg. See also my Honda manual transmission specs thread.

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