MMO in the oil?
 

I just changed the oil and added MMO. The bottle says 20% MMO. I haven't ran the engine yet because that looks like too much MMO to me, especially in an older high hour engine. The oil is straight 30 wt. Your thoughts?

I have done it. My intended purpose was to de-sludge the engine. Ran it for a few hours then I changed the oil. I had no issues.

Thanks Roland, I'll try that.

For what it's worth, at least in our small engines, I wouldn't make a habit out of running MMO regularly in either oil or fuel. I used to run a small amount of MMO in every drop of gas that I put into my machines. Now, however, I only do it once every couple fillups. As far as oil, as Roland said, at least in my opinion, I'd only run it for a short time to clean things up, not a permanent additive. I'm sure others will have thoughts on this and that's what makes this country great! :biggrin2:

Jimbob,
What problems did you experience running it in the fuel? Does it cause problems over time?

I never had problems directly related to the MMO. I had an engine that smoked, it cleaned up a bit after it was switched to straight gas but there were other problems with the engine to begin with. Like I said, I still use it, just not as frequently. I talked to a couple knowledgeable guys on the subject and the census seemed to come to "why make gas, less gas"? Additives are great, if they serve a purpose. If I was starting a machine that had been sitting for a long time, sure, I'd add some MMO to the gas and a touch to the oil to help clean things up; ya know, add a little of the "MMO Mystery Touch" to the internals and the carb, so to speak. But to add it just to add it, nah. Engines were designed to run on gas, and gas is what I'll give them. Keep in mind, that's just my :TwoCents: :beerchug:

I was not a fan of oil additives, until this summer.

My ATV (2 cycle) seemed to be running hot due to lack of sufficient oil injection, but, now I believe the machine was running hot due to the weather, it was a VERY hot day.

I added extra oil to the gas, in effect doubling the amount of oil.

The machine began running incredibly cool!! :bigeyes:

http://i1104.photobucket.com/albums/...psaa52d96a.jpg

I am still running the extra oil.

Before you ask, I added the antenna to cut the spider webs that are so prevalent this time of the year,,,, :bigthink:

A couple of thoughts. Gasoline is what has a cooling effect on engines. When the liquid vaporizes it cools. Oil does not have this direct cooling effect. Second, if your adding additional oil to the fuel you are in effect leaning your fuel mixture. Carb jets only flow a finite amount and more oil in the gas means less gas as a percentage is flowing through a fixed jet. Be cautious as we all no what an overly lean two stroke does. If additional oil created a cooling effect, it was because you had inadequate lubrication to begin with and were experiencing increased heat from friction.

I'm not really into what you are saying. You make some interesting points...... but I disagree with most of them. :coffee:

I use about 3/4-1 ounce of MMO to one gallon of gas in my 1250 Nightmare. I also use an ounce of StaBil per gallon of gasoline. A good friend, who is a small engine mechanic claims that we need a bit of upper cylinder lubricant to replace the lead that was once in the gas when our Kohlers were built. (sounds good to me) I don't notice any smoke with the MMO in the gas, the engine runs great, the spark plug is very clean and is wearing evenly, and I don't need to drain the gas when the machine is parked in the winter.

I started with 4 ounces per gallon, and that was way too much. the one ounce cleaned up the exhaust and made the engine run better. I am sold on the practice.

I gotta "ditto" J-Mech, most of the negative assumptions requires the additive to change the viscosity of the fuel, with the low % of oil added, that ain't happenin'....

The reduction of burn rate of the fuel by adding oil (kinda like higher octane) has a tremendous cooling effect.

No matter what,,,, (too many variables to discuss),,, the results are better with than without oil, for me,,,, :bigthink:

It make sense about the upper cylinder lube. But iirc these kohlers were designed for unleaded fuel I believe I remember reading that they advise not to use leaded fuel. I could be wrong but I am pretty sure

MMO
 

I've been using the mmo for about 5 years 4oz in a 5 gallon can no ill effects at all ,over the winter months a little sta-bil for the 109 & 108 they think it is delicious !!

Honestly, I don't know why so many of you guys use sta-bil and MMO, and other additives. I must run my machines more or have better fuel or something..... 87 octane pump gas is all mine ever drink. No problems whatsoever. No wore out motors. No valve problems. No issues sitting. (They seldom sit longer than a month.) No water in my fuel. Nothing. I just don't get why so many on here have so much trouble with fuel. :bigthink:

I agree, my weed eater sits all winter with gas in the tank and come spring it always starts on the 2nd pull. The 108 doesn't see much action in the winter either unless we have a lot of snow and it always fire right up to.

I feel it's not necessarily problems with fuel or anything else, it's more of preventive maintenance. The idea of providing these additives makes us feel like we're doing something that will help prevent issues. Call it good marketing or call it unproven but I think that's the reasoning.
I've always been a little skeptical how a few ounces added to many gallons of gasoline could actually keep the carb clean when I'm not sure it would clean it full strength.. As I said, I've never really tested these products but I can be seen pouring some of it in tanks now and again. I pour some of the cleaning additive in my car too. I don't have any idea if it really helps. I guess the marketing efforts really do work because they have us believing that these product really do help.

I'd say you :NailHead:


Just playing "devil's advocate" here.


So..... if at least two of us say no issues with gas (I'm sure there are others), while some say that they treat but have no issues just like the ones who run nothing. Do you wonder if it's a waste of $$?

I work on motors everyday. I can honestly say, I have yet to see a product that "prevents" anything. (Except air line anti-freeze and diesel anti-gels.... they do work... up to a point) There are some good fuel additives that I use on motors that have not been well taken care of. I don't advocate using them all the time to my customers. Once performance improves... the additive stops. If performance doesn't improve then we spend $$ and make it improve. Most of the time we only do this on engines we have opened up and see how dirty the inside, or the fuel/intake system is. FWIW, I have also seen failures on things like engines, transmissions, cooling systems, even A.C. systems that had too much additive in them. Most people don't go to excess, but I've seen it. I for one, think that a continual addition is unnecessary, and can even be detrimental. That's my "professional" opinion. I just wanted to share it. I think they are mostly just taking your money. You all do as you see fit. :beerchug:

I do use MMO, stabil, and startron in all my small engine gasolines. After talking with several small engine shop owners who all said current gasolines do harm to these engines. I cannot get alcohol free gas anywhere within reason. I have been using MMO for several years now and although only a little per container have not had any fuel related problems with any of the fleet. I am using the stabil because I had a bunch that was several years old and wanted to use it up. The startron I use to counteract the alchohol that is added to current gasolines. Since I have been adding these to my 2 and 4cycle gasses I have seen seen a little improvement in the engines starting up. My gas also seems to last longer without getting the stale skanky smell of old gas.

I do use stabil in my gas but that is because my stuff is not used all that often. I've had to rebuild my carb on my snow blower each year before I started using the stuff. Now I seem to be dodging a bullet because it starts just fine. I even tried to run the blower dry each year but just that little bit left in the carb I guess clogs it up. I'm really not the most handy guy in the garage (but working on this) so if this stuff can even help a little Ill pay the marketing machine :)

Fuel stabilizers do not freshen old gas. It only extends the useful life when added to fresh gas.

I don't do much , I'm not into additives. in the winter when temps dip I'll use Isopropyl in gas tanks but that's pretty much it.

from my snowmobile days. most sled manufacturers recommend running premix till you know the oil injection is functioning properly. you usually fowl plugs if you putz along . I used to run nitrous on one of my Polaris race sled. I took the oil injection off and went to premix to have better control of my oil/fuel mix and jetting.

adding oil to the gas, ambient temps, ethanol,humidity , atmospheric pressure and water grains all affect jetting
I find myself reading plugs and looking at exhaust temps allot in my tuning adventures

By MMO your talking about marvel mystery oil right.
It has a friction modifier like ATF some use ATF instead MMO looks alot like ATF
We used Justice bros engine tune up in the late 70's and 80's they had tests that proved it lowered friction to parts that rubbed from the friction modifier

one test they had a video of was back then they bought 25 used Datsun 510 and 610 cars out in Cal. and had them gone over so they all ran good with new oil 1/2 got the additive in the oil
Then took them to the salt flats and told the drivers to drive them as far as they could easily after the oil was drained
the no additive cars made it 3-5 miles
the additive cars made it 15 to 22
it was indedendently verified.

if you have ever changed and cleaned out the rear end diff on a limited slip
ZJ and forgot to add the friction modifier you will know in 2' of wheel travel