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Old 01-28-2020, 05:52 PM   #1
Standing Elk
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Default Sea-Foam

Just asking, if anybody runs a dose of Sea-Foam in their crank case occasionally to eliminate the accumulation of any sludge? I watched some clips where they did some tests doing this on a more modern engine and the results were pretty impressive. Thanks
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Old 01-28-2020, 06:06 PM   #2
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Default Re: Sea-Foam

Not in the crankcase but I do run 1 oz per gal. in the gas tank.
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Old 01-29-2020, 06:38 AM   #3
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Default Re: Sea-Foam

I have in the modern used cars I’ve bought. Never in an A though. I always had good results with it though.
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Old 01-29-2020, 09:15 AM   #4
Patrick L.
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Default Re: Sea-Foam

I've used it for over 40 yrs in the fuel. Never have put it oil.
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Old 01-29-2020, 11:36 AM   #5
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Default Re: Sea-Foam

I thinkin if you run modern detergent oil you shouldn't have to worry about sludge
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Old 01-31-2020, 11:47 AM   #6
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I have only ever used Sea Foam in my fuel tank, But, I started looking around on the web and found a lot of info from Sea Foam on use in the oil pan! I share it here, not as an endorsement for Model A's use, but for information to make a decision! There is a person asking if use in his Fordson tractor is ok and Sea Foam support provides a yes with instructions... See https://seafoamsales.com/knowledge-b...a-foam-in-oil/
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Old 01-31-2020, 12:20 PM   #7
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Default Re: Sea-Foam

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Originally Posted by ryanheacox View Post
I have in the modern used cars Ive bought. Never in an A though. I always had good results with it though.
Same here, cleaned out a restricted oil pump screen on my 86 F150. The can does say you can use it in the oil.
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Old 01-31-2020, 12:43 PM   #8
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Default Re: Sea-Foam

I run four ounces of Marvel mystery oil per each ten gallons of gas . I have sometimes added a bit of marvel oil to the crankcase with no problem . I run 20 W 50 detergent oil in my model A engines with good results .
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Old 01-31-2020, 06:19 PM   #9
marty in Ohio
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Default Re: Sea-Foam

I use Marvels in my "A's" gas but have never put in the crankcase. My thinking is that MMO is more of a solvent, and I don't know if I want to add a solvent to my oil. Correct me if I'm wrong.
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Old 02-01-2020, 07:00 AM   #10
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Default Re: Sea-Foam

youtube has video on seafoam, I have been using it for years in a 1999 sl500 mercedes,2004 chevy blazer,1959 allis backhoe,1930 model a only in fuel. Works great for keeping fuel system clean
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Old 02-01-2020, 10:21 AM   #11
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Default Re: Sea-Foam

I have placed SeaFoam in my A crankcase before. Mostly when I first change the oil. A couple of ounces is all. I use it and also MMO in my fuel too, whichever is on sale. Car seems to start & idle better.
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Old 02-01-2020, 11:34 AM   #12
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Default Re: Sea-Foam

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Originally Posted by Beater View Post
I thinkin if you run modern detergent oil you shouldn't have to worry about sludge

Correct. The only times I've used it in the crankcase is the first couple oil changes after I bought a high mileage used car. I figure it's good practice in case the previous owner didn't keep up on oil changes.



I changed a valve cover gasket on my Jeep at 215,000 and the top end looked new, no sludge, not even any varnish. Was it the seafoam? Maybe, maybe not but it sure didn't hurt anything.
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Old 02-01-2020, 02:28 PM   #13
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Default Re: Sea-Foam

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Originally Posted by Purdy Swoft View Post
I run four ounces of Marvel mystery oil per each ten gallons of gas . I have sometimes added a bit of marvel oil to the crankcase with no problem . I run 20 W 50 detergent oil in my model A engines with good results .
Same here. MMO is a high detergent oil won't hurt to run a dab thru your motor oil even soon before you change oil if your engine isn't too gunked up. Otherwise I wouldn't it may kick loose a bunch of crap that clogs up places you don't want clogged up
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Old 02-01-2020, 03:44 PM   #14
Purdy Swoft
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Default Re: Sea-Foam

My engine is clean inside . The times that I added Marvel to the crankcase was to help relieve sticky new stainless steel valves in new valve guides . It has been said that new stainless steel valves can get sticky . The Marvel oil worked and I didn't have to use it all the time in the crankcase . I think that the last time that I took the time to read the label , it was also recommended for use in the crankcase in measured amounts .
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Old 02-01-2020, 04:19 PM   #15
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Default Re: Sea-Foam

Other than a few people I know who are on this forum, nobody here has heard of Seafoam (MMO either). How much do they cost? Are they flammable? That would affect the cost to import some dramatically. I'm doubtful the cost and effort would be worthwhile.
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Old 02-01-2020, 06:58 PM   #16
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Default Re: Sea-Foam

The MSDS for Seafoam doesn't tell much but it is some blend of hydrocarbons. Usually runs about $5-$10 for a pint bottle.



MMO I think is mostly naptha with eleven secret herbs and spices and some wintergreen oil mixed in. Usually runs about $4-$7 for a quart. Both are very flammable obviously.
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Old 02-01-2020, 07:45 PM   #17
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Default Re: Sea-Foam

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Originally Posted by ryanheacox View Post
The MSDS for Seafoam doesn't tell much but it is some blend of hydrocarbons. Usually runs about $5-$10 for a pint bottle.



MMO I think is mostly naptha with eleven secret herbs and spices and some wintergreen oil mixed in. Usually runs about $4-$7 for a quart. Both are very flammable obviously.



I think Sea-Foam is also naptha but without the secret herbs and spices.

Last edited by Patrick L.; 02-02-2020 at 07:55 AM.
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Old 02-01-2020, 08:04 PM   #18
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Default Re: Sea-Foam

I use 4 ounces of MMO to each 10 gallons of good gas without the corn crap, and it really does help.


I'm also a believer in SEA FOAM as it freed up stuck hydraulic lifters in an Olds. I poured a can in the oil, and within 5 miles the engine was quiet.
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Old 02-29-2020, 07:48 PM   #19
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Default Re: Sea-Foam

I was thinking the same thing as Marty in Ohio
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Old 02-29-2020, 09:01 PM   #20
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Cool Re: Sea-Foam

Walmart sells a cheaper copy of Seafoam in a similar looking can.
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