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Sea foam or marvel mystery oil?


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#1 Countryboo OFFLINE  

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Posted October 03, 2016 - 03:57 PM

Which is better for cleaning the carbon & all out of the engine?

#2 Mtypython ONLINE  

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Posted October 03, 2016 - 04:52 PM

never used sea foam,not even in my outboard,always put a lil mystery oil in my gas,no problems yet goin on 50 years using the stuff


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#3 propane1 ONLINE  

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Posted October 03, 2016 - 05:06 PM

Transmission fluid. Put in with oil to clean engine from sludge, stuck piston rings, sticking lifters, etc, and put in gas to clean carbon.
Sea foam is just different types of alcohol.

Noel.

Edited by propane1, October 03, 2016 - 05:19 PM.

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#4 boyscout862 ONLINE  

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Posted October 03, 2016 - 05:21 PM

I've never used Sea Foam, only know that it costs more than Marvel Mystery Oil(MMO).

 

I've used MMO for 49 years. My grandfather gave me my first can to use on my first car in SEP67. I did an experiment on a 283 in a 63 Impala in 1970. I was given the car and was going to rebuild the engine to use in my drag racing 64 Chevelle. The engine was very carboned up. For the heck of it, I got the engine running and slowly dumped a pint of MMO down into the carb. She smoked like a Uniroyal Stack. I shut her down and left her to sit for several days(until it was raining). I ran her for awhile and really blew her out. I then brought her into the garage and pulled the 283. I tore her down and found very little carbon in the combustion chamber. I found that the rings still had some problems but were much better. Years later, I found that putting MMO into my gas would do a good job of slowly cleaning combustion chambers, rings, and valves. I saved several older engines that way. Several months of MMO would stop smoking and increase the compression. When it is on sale, I buy it by the case. Good Luck, Rick


Edited by boyscout862, October 03, 2016 - 05:22 PM.

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#5 jabelman OFFLINE  

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Posted October 03, 2016 - 05:29 PM

I use both, but I had an old briggs that smoked like crazy, seafoam cleaned out and it hasn't smoked since. most of my engines i still just add a little marvel too. I have been using seafoam more lately when I work on something I like the results for cleaning
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#6 UncleWillie OFFLINE  

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Posted October 03, 2016 - 06:01 PM

I use both.The seafoam will clean out a carb without having to take it apart. The MMO is great too. Hard to say which is best. 


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#7 KennyP ONLINE  

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Posted October 03, 2016 - 06:21 PM

I use both on a new to me engine. A little each in the gas and some MMO in the oil.


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#8 grnspot110 ONLINE  

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Posted October 03, 2016 - 06:23 PM

Another vote for both, according to label directions in all my stored gasoline!


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#9 adamjd200 OFFLINE  

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Posted October 03, 2016 - 08:53 PM

I'm a fan of both, also like Lucas Oil Treatment in the oil in engines that smoke.


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#10 toppop52 ONLINE  

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Posted October 03, 2016 - 08:53 PM

I use both, both are excellent for their intended purposes.
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#11 ol' stonebreaker ONLINE  

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Posted October 03, 2016 - 09:30 PM

  When I got my Hobart with the Wisconsin the carb was badly varnished. Disassembled the carb and soaked overnite in seafoam and was clean as a whistle the next morning. I'm also a firm believer in MM oil in the crankcase and also use it as air tool oil.

                                           Mike


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#12 Countryboo OFFLINE  

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Posted October 03, 2016 - 10:07 PM

Thanks for all the responses. Growing up working with dad on cars it was MMO. I'm assuming that's all they had back then. I'll get some of both.

#13 boyscout862 ONLINE  

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Posted October 04, 2016 - 07:48 AM

Thanks for all the responses. Growing up working with dad on cars it was MMO. I'm assuming that's all they had back then. I'll get some of both.

In the 30s MMO was very popular with aircraft mechanics. I wonder if the military used it in WWII? That would have convinced millions of GI mechanics. Good Luck, Rick






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