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.