Marvel Mystery Oil vs. Seafoam in ....


Information and questions on GL1100 Goldwings (1980-1983)
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robertdawber
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Marvel Mystery Oil vs. Seafoam in ....

Postby robertdawber » Thu Aug 27, 2015 8:44 am



What has been people's experience with these two in the crankcase?



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roadwanderer2
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Re: Marvel Mystery Oil vs. Seafoam in ....

Postby roadwanderer2 » Thu Aug 27, 2015 9:27 am

the marvel mystery oil mixes better with the engine oil, the sea foam on the other hand makes the bike put out a LOT of white smoke if you use it directly into the carb plenum while the bike is running to get quicker cleaning results, but if you put the sea foam into the fuel tank, it does make my bike run a little better while it helps to clean the fuel system. i can feel the difference in the horse power especially on take off and powering up thru the gears. it lets the bike get up to its max rpm's quicker without stumbling or hesitation. using higher grade fuel, (89-93 octane), also helps.

stuart.

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Re: Marvel Mystery Oil vs. Seafoam in ....

Postby robertdawber » Thu Aug 27, 2015 9:58 am

I want to clean the engine out.

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Re: Marvel Mystery Oil vs. Seafoam in ....

Postby WingAdmin » Thu Aug 27, 2015 10:34 am

I have not used MMO in my crankcase. I have used Seafoam however, which acts as a solvent. It is very good at dissolving sludge deposits in the engine.

In my GL1100, I changed the oil, and when filling with fresh oil, added half a can of Seafoam. According to Seafoam, the correct amount is 1.5 oz Seafoam for every quart of oil, so for four quarts of oil, that's 6 oz of Seafoam. Half a can is 8 oz, so that's fairly close. I then ran the bike for 30-45 minutes, making sure it got good and hot - but did not stress the engine (i.e. no hard acceleration).

I then drained the oil. What came out was not the honey-colored oil that I expected; it was grey and disgusting, and large chunks of gooey, black sludge came out as well.

After seeing this, I now make it a point of adding a small amount of Seafoam to my crankcase oil just before performing each oil change.

Particularly on the four-cylinder Wings, which have poor oil circulation in the area of the sprag clutch, causing it to clog and fail, Seafoam usage is excellent preventative maintenance.

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Re: Marvel Mystery Oil vs. Seafoam in ....

Postby roadwanderer2 » Thu Aug 27, 2015 12:52 pm

i agree with wingadmin 100% on this. after i installed my new timing belts, before i did the oil change, and added 1/2 can of the sea foam, rode it for about 70 miles and what came out was amazing. there had to be 30 years of crud buildup inside that motor. what an icky mess it was. im surprised that it was running as well as it was with what came out. now i add 1/2 a can to the crankcase about 50 miles before i change the oil. doing this makes the engine run quieter and smoother and allows it to "breath" better. you know that little canister that's on the bottom behind the starter that your suppose to empty every so often? i went to empty it the other day and its still empty, and ive put almost 3,000 miles on this bike since i changed the belts, tensioners and did a valve adjustment on it this past May.

stuart.

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Re: Marvel Mystery Oil vs. Seafoam in ....

Postby robertdawber » Thu Aug 27, 2015 9:04 pm

Thanks guys.
Stuart, I think I will get in that habit.
Bob

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Re: Marvel Mystery Oil vs. Seafoam in ....

Postby roadwanderer2 » Fri Aug 28, 2015 6:57 am

good idea as it might help yours also. when you add the sea foam in your oil, try not to over tax the motor as in no high rpm's or riding it like its a "crotch rocket" since the oil will be thinned a little. go easy with it for the 50 or so miles before you empty the oil out.

stuart.

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Re: Marvel Mystery Oil vs. Seafoam in ....

Postby SilverDave » Fri Aug 28, 2015 9:48 am

You get exactly the same results with Marvels Mystery Oil as you get with Seafoam ....
a glug or three in oil before a change brings out all sorts of sludge , and some in gas tank also cleans the carbs out ...

I have used both at various times , as , for reasons I cannot fathom, they are both not always available at auto stores in Canada .

And according to my real cheap riding friend , MMO is mostly transmission fluid , so , you can , apparently use that is you cannot find either .
( I have never done that, but its an interesting , but unconfirmed rumour )

When I can find either Seafoam , or MMO,at Canadian Tire, its not a lot of money to get good oil cleaning, or good carb cleanout with either ...

SilverDave

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Re: Marvel Mystery Oil vs. Seafoam in ....

Postby WingAdmin » Fri Aug 28, 2015 9:57 am

NAPA regularly has Seafoam on sale, so I will make a point of buying quite a few cans when they have them on sale.

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Re: Marvel Mystery Oil vs. Seafoam in ....

Postby chrisz » Mon Aug 31, 2015 9:19 am

A question to those who use Seafoam/MMO in their crankcase.

When using these formulations before oil changes, the nasty stuff you guys describe coming out as crud, etc, I'm wondering about the crud that didn't come out during the oil change and is still attached (but loosely). This stubborn crud may at some point in the next ride of so, dislodge and floats about the engine... could this be a cause for concern or hopefully the oil filter will pick this out?

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Re: Marvel Mystery Oil vs. Seafoam in ....

Postby roadwanderer2 » Mon Aug 31, 2015 9:25 am

ya know, that's a good question, what i would do is to do 2 oil changes, the first one to get rid of the large crud chunks that the sea foam or the MMO gets out, then run the motor for about 20 minutes or so with fresh oil and filter, then drain it and change the oil and filter again. that should get the majority of it out.

stuart.

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Re: Marvel Mystery Oil vs. Seafoam in ....

Postby chrisz » Mon Aug 31, 2015 9:56 am

roadwanderer2 wrote:ya know, that's a good question, what i would do is to do 2 oil changes,
stuart.


Or maybe just one oil change per Honda recommended interval without any additives, and leave it at that... ;)

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Re: Marvel Mystery Oil vs. Seafoam in ....

Postby WingAdmin » Mon Aug 31, 2015 10:53 am

chrisz wrote:
roadwanderer2 wrote:ya know, that's a good question, what i would do is to do 2 oil changes,
stuart.


Or maybe just one oil change per Honda recommended interval without any additives, and leave it at that... ;)


Except that doesn't solve the problem of the areas of the engine (the sprag clutch, primarily) that receive very poor oil flow, and which tends to collect the crud naturally floating around in oil.

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Re: Marvel Mystery Oil vs. Seafoam in ....

Postby roadwanderer2 » Mon Aug 31, 2015 1:55 pm

ok, so wingadmin, what would you recommend, just out of curiosity.

stuart.

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Re: Marvel Mystery Oil vs. Seafoam in ....

Postby WingAdmin » Mon Aug 31, 2015 2:56 pm

I generally put half a can of Seafoam in the crankcase just before each oil change. I change my oil at around 3500 to 4000 miles.

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Re: Marvel Mystery Oil vs. Seafoam in ....

Postby roadwanderer2 » Mon Aug 31, 2015 6:16 pm

how many miles do you ride your bike before you drain the sea foam out. i ride mine about 75 miles.

stuart.

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Re: Marvel Mystery Oil vs. Seafoam in ....

Postby WingAdmin » Mon Aug 31, 2015 7:22 pm

roadwanderer2 wrote:how many miles do you ride your bike before you drain the sea foam out. i ride mine about 75 miles.

stuart.


Near the same - 50 to 75 miles.

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Re: Marvel Mystery Oil vs. Seafoam in ....

Postby roadwanderer2 » Mon Aug 31, 2015 7:50 pm

ok, so i guess that's a good range of doing the 1st change, then the 2nd half of the container and about another 25 for the 2nd change.

stuart.

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Re: Marvel Mystery Oil vs. Seafoam in ....

Postby Jeff_65 » Tue Sep 01, 2015 5:44 am

WingAdmin wrote:NAPA regularly has Seafoam on sale, so I will make a point of buying quite a few cans when they have them on sale.

if you have a Walmart near you, it's 1/2 the price I paid for it at Napa, I get a discount there.
I add it every other fill up, I've had no acceleration or bogging issues since using Seafoam, will be adding to the crank case,soon time for my oil change.
Jeff 8-)

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Re: Marvel Mystery Oil vs. Seafoam in ....

Postby roadwanderer2 » Tue Sep 01, 2015 7:06 am

im going to be putting in some sea foam and changing my oil today since im going on my ride down to Florida on Thursday. i want to start this ride with fresh clean oil and filter and see what it looks like once i get to my destination. i might also do a fuel filter and air filter change while im at it.

stuart.




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