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Ford Tractors Discussion Forum
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gas additive

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bottomboard

12-10-2005 05:03:11




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1956 (800) series Ford Tractor: Is using gas additive a good idea? I have heard someone say that using "Marvel Mytery Oil" is a good choice as it cleans carb and leaves a oil base to the gas tank preventing rust.....looking for advise tractor wizards....thanks... Paul




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larry loy

12-11-2005 10:55:16




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 Re: gas additive in reply to bottomboard, 12-10-2005 05:03:11  
johnson outboard OMC fuel additive is absolutely the very best to keep fuel in good condition for long periods of time..has kept up two or three years in cars.. boats... generators.. and etc.



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Dan Hill

12-11-2005 04:20:11




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 Re: gas additive in reply to bottomboard, 12-10-2005 05:03:11  
Ive found that MMo in the gas will make the shut off valve on my 640 very hard to turn on.This valve has an o ring seal that I think swells in MMO .This valve costs 50.00 so I avoid putting MMO in the gas.I will put an o ring in some MMo and see if the o ring swells or worse disolves.Try this test before using mmo.



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JD9295

12-10-2005 20:54:09




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 Re: gas additive in reply to bottomboard, 12-10-2005 05:03:11  
MMO is worth the money. I dont run it in every tank full, about every third. All my stuff is diesel and it does help clean the parafin off the injectors and pump and i believe helps the valves.
I also put a quart in my oil pan on my truck THE DAY i plan on changing the oil and run it just till it warms up. t will break the gunk loose in the engine. The reason I only run it a little while before droppping the oil, we bought a used truck for the farm, it had quaker state oil in it, i put a quart of MMO in and drove it for a while then lost all oil pressure. When i dropped the plug out nothing would come out. Droppped the pan and there was so much gunk in the pan it couldnt drain. Took the valve covers back off and all the quaker parafin was gone. MMO A+

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BruceR TN

12-10-2005 15:14:23




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 Re: gas additive in reply to bottomboard, 12-10-2005 05:03:11  
I've always used Sta-bil in the gas when putting up for the winter and have had good success (with a full tank of fuel). When running R/C engines, I used a 50/50 mixture of transmission fluid and Marvel Mystery Oil as an "after-run" oil and ran everything dry (i.e. empty the carb)...sure kept the high nitro (25%) fuels from eating up bearings. Reading the other posts, I don't see a comment I would disagree with. Your choice.

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old

12-10-2005 07:24:49




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 Re: gas additive in reply to bottomboard, 12-10-2005 05:03:11  
Either one of the things the other 2 guys said work well and do the same thing. I use tranny fluid once in a while nice thing is trany fluid is a lot cheaper then the MMO and does the same thing. I also at times put some carb cleaner in the gas also. But I buy tractor gas by the 40 gallion tank and add the stuff when I fill that tank but only do that about twice a year as far as adding the stuff to my tank.

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Ricky in NC

12-10-2005 06:27:49




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 Re: gas additive in reply to bottomboard, 12-10-2005 05:03:11  
I use regular transmissin oil ocasionally. Mix about 1/2 quart with a full tank of gas. Not all the time just once in a while. I do that with my diesel tractor and cars also.



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MarkB_MI

12-10-2005 05:50:21




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 Re: gas additive in reply to bottomboard, 12-10-2005 05:03:11  
I use Marvel Mystery Oil, but not for the reasons you describe. I believe it prevents valve sticking, which is a real problem for engines that are used infrequently. I have had much less trouble with my tractor since I started using MMO.

I can't imagine MMO is going to clean your carb, and the best way to prevent rust in your gas tank is to keep water out of your fuel.



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Dave in Ms

12-10-2005 08:31:48




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 Re: gas additive in reply to MarkB_MI, 12-10-2005 05:50:21  
Everyone who read this and knew better, also knew better than to reply and start something. Having never been accused of being the silent type, here's my $.02 worth: If you use the tractor infrequently, and you dont live on Mars, you are going to get water in the tank. Period. The atmosphere here on Earth contains water in an amount depending on your locale's humidity. Daily temperature variations will cause that water to precipitate out of the air inside your gas tank, and that water, being heavier than gasoline, will collect on the tank bottom. You can minimize the effects of this accumulation, by regular monitoring of your sediment bowl. When you see water in the bowl, drain it. By checking it often you will catch any water accumulation before it builds up enough to cause a problem. All that said, the best way to prevent rust in your tank is to coat the inside of it with one of the products available for that purpose. Gas additives are a recurring expense which, at worst are a questionable fix, and at best, temporary, lasting only until you refill the tank. A little top oil is good for your valves, but doesn't do much for your tank.
Another thing you can do that may save you some carburetor grief, is to shut off the gas supply before killing the engine. Letting the engine use up the gas in the float bowl will take the pressure off the needle valve, which gives the needle's Viton tip a rest. (Does your carb flood for no apparent reason at times?) Also, it will help with preventing rust and crud build up in the float bowl. As some comedian likes to say:" This is just my opinion, I could be wrong". But it does work for me.

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