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Old 11-03-2015, 05:46 PM   #1
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Mystery Oil

Any benefit to adding Mystery Oil to fuel for the Ford Lehman 120?
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Old 11-03-2015, 06:02 PM   #2
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Bob Smith told everyone at the spring GB Rendezvous that 1 quart per 100 gal will make for a happy Lehman.
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Old 11-03-2015, 06:23 PM   #3
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Zero.

In fact you could say it has a potential negative effect.


"17)Marvel Mystery Oil Gas, oil and Diesel fuel additive (NOT ULSD compliant, may damage 2007 and newer systems) HFRR 678, 42 microns worse than baseline fuel. 320:1 ratio 10.4 oz/tank $3.22/tank"

http://www.dieselplace.com/forum/76-.../177728?page=1
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Old 11-03-2015, 06:32 PM   #4
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Mystery Oil

I see you stated that engines 2007 and later could become compromised. How about engines before this date?
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Old 11-03-2015, 07:25 PM   #5
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I didn't state anything. I was quoting. And based on the results of the quoted test, I'd say MMO is of no benefit to any diesel engine.

But people can waste their money on it if it makes them feel better.
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Old 11-03-2015, 07:56 PM   #6
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I think quoting is stating Bill .. you just don't have to stand behind it like all the other stuff we say on TF.

Oil in the fuel sounds like a good thing but I'm convinced it's not needed in any way and possibly could be harmful .. probably not likely though. Other than Stabil and BioBore no other additives are needed. I think Bob Smith is a mechanic by trade and is a very helpful guy but I've heard many mechanics recomend all kinds of fluids for engines since I was a teen (in the 50's). Sometimes it's good and sometimes it's not .. mostly the latter. Bob Smith has near deity status in some corners of this forum but on fuel additives I think he's showing his real feathers. Everything else I would/could say about the man is very positive.
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Old 11-03-2015, 07:59 PM   #7
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Old 11-03-2015, 08:05 PM   #8
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I always have and always will use Castrol mineral 2 stroke oil @200:1 in my diesel 4x4 Pajero
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Old 11-03-2015, 08:15 PM   #9
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I'd rely on what your engine manufacturer says. Did I overlook J. Deere saying I should add oil to the diesel fuel? (Ordinary diesel fuel seems oily to me.)
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Old 11-03-2015, 08:43 PM   #10
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If Bob Smith, who was VP of Lehman and wrote the Intro to the Lehman Owners Engine and Parts book, recommends the product, for engines he produced and still supports, his implicit view the product is good needs to be given some credence. That said, I`ve never heard of the product and my engines seem to survive well without it.
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Old 11-03-2015, 08:51 PM   #11
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Quote:
Originally Posted by manyboats View Post
I think quoting is stating Bill ..
I beg to disagree. But I do believe the results of the study.
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Old 11-03-2015, 09:23 PM   #12
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Quote:
Originally Posted by gaston View Post
I always have and always will use Castrol mineral 2 stroke oil @200:1 in my diesel 4x4 Pajero

I agree if one can't resist the temptation to "help" their fuel w a lubricant two stroke oil should be far better than most or all other oils.

But again none of the fuel oils availible to us need extra oil. Like Mark says .. read the manual or even call the manufacturer and speak to an engineer. That can be done.

Come to think of it if I added lube oil to my diesel fuel I'd consider a synthetic motorcycle racing lubricant called "Bell Ray MC1+". But I would call the maker of that product (very tech minded) about using it. Depending on what they say I would forget about it or do more research. But the bottom line is what is there to be gained. And whatever it may be I don't think I could significantly benefit from it as my engine does everything I would want it to do as it is. Even if it could double the life of my engine. Why would I want that? I can't even come close to wearing it out as it is. So what would be the point? Why take chances? Too much to loose and definitely too little to gain.
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Old 11-03-2015, 09:42 PM   #13
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I agree if one can't resist the temptation to "help" their fuel w a lubricant two stroke oil should be far better than most or all other oils.

But again none of the fuel oils availible to us need extra oil. Like Mark says .. read the manual or even call the manufacturer and speak to an engineer. That can be done.

Come to think of it if I added lube oil to my diesel fuel I'd consider a synthetic motorcycle racing lubricant called "Bell Ray MC1+". But I would call the maker of that product (very tech minded) about using it. Depending on what they say I would forget about it or do more research. But the bottom line is what is there to be gained. And whatever it may be I don't think I could significantly benefit from it as my engine does everything I would want it to do as it is. Even if it could double the life of my engine. Why would I want that? I can't even come close to wearing it out as it is. So what would be the point? Why take chances? Too much to loose and definitely too little to gain.


Note of warning never use a synthetic 2 stroke oil in diesel its been known to split and not mix as against mineral 2 stroke where it mixes 100%


2 Stroke in diesel is best used on "electric" common rail motors I think my Perkins would run on used Mc Donald chip cooking oil
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Old 11-03-2015, 09:50 PM   #14
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I worked on a drilling rig in west Texas in the 80's. Those rigs were powered by big diesels. They ran 24/7 365. The mechanics swore by marvel mystery oil added to the fuel. I've used it in my lehmans for the last 7 years
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Old 11-03-2015, 10:46 PM   #15
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I worked in a machine shop where several of the machinists wouldn't go out on a feild Job w/o MMO. Used it as a cutting oil.

gaston,
The Bell Ray is very high in heat resistance and of very high viscosity. The viscosity is so high it can't be run in auto 2stroke lube injector systems. 100% synthetic. And your right it quite likely won't mix w diesel. Dosn't mix extremely well w gasoline but once it's mixed it stays mixed. But I'm just making conversation here. I wouldn't use it or even consider using it unless a lot of investigation showed large benifits and I was planing on running my boat constantly for the next five years.

Again I don't think anybody's gaining anything by adding oil to diesel. And listening to mechanics swearing won't help.
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Old 11-03-2015, 10:50 PM   #16
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Marvel Mystery Oil = magnetic algae killer.
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Old 11-04-2015, 12:44 AM   #17
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MMO, Smells good too!
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Old 11-04-2015, 01:34 AM   #18
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I can see that this is a very sensitive subject. But here is my 2 cents worth.
I'm not a engineer, or a diesel tech, but I have put all kinds of oils and after market additives in my construction equipment, motor homes and late (pre 08) model trucks. The engines were all designed to run on the older diesel that had higher amounts of Sulfur. I saw no adverse effects on any of the engines and was convinced that adding a Lube in the form of ATF, cheap 30 weight oil or even Lucas additives at the rate of 1 quart for every 100 gallons. And will continue to do so with diesels that are pre 08.
Many of my friends that are semi truck owner operators have done this to there older fleet. In fact a very good friend just ordered a new truck without driveline and is installing an older engine to be installed upon delivery, guess it's a common practice outside Calif. He did have to rebuild his last one at 850,000 miles, so maybe he knows something.
But hey, advise on the inter web is just that, so do with your diesel as you see fit. Most of you will never wear a diesel motor out, unless it had a lot of hours on it prior to you. Adding a quart of cheap oil to every 100 gals isn't gonna were your engine out any sooner.
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Old 11-04-2015, 01:47 AM   #19
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OK, so stuff you have used has not hurt you engine. How do you measure or quantify "not hurt" and like wise "does help"?
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Old 11-04-2015, 02:00 AM   #20
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A fuel additive study done by the trucking industry a few years ago tested a number of diesel additives for effctiveness. Some were found to be helpful. Some not so much, and a few were found to be detrimental. This study was posted by a member to the Grand Banks Owners forum which is where I read it.

Marvel Mystery Oil was one of the additives tesed. MMO was developed during WWII to help prevent the gumming up of carburetors in military vehicles due to poor or variable fuel (gasoline) quality used in the combat zones.

As a diesel fuel additive the trucking industry study shows that MMO actually reduces fuel lubricity, something you do not want in an older jerk-injection engine like the FL120. Rather than having little or no beneficial effect as a diesel additive MMO was found to actually have a detrimental effect. The study summary states it is NOT recommended as a diesel fuel additive.

Bob Smith knows a lot about Ford Lehman engines but in the case of MMO he is unfortunately promoting an old shade-tree mechanic's myth.
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