MMO in to GAS ?

[INDYMAC]

I've been using MMO as a UCL for quite some time. I find it to be an excellent choice for quieting valvetrain and injector noises when used per the instructions in the fuel. I can't say whether it is a good FI cleaner, because I have no way of measuring this accurately. Based on UOA's of the same equipment with the same oil and oil filter, it does not appear to improve fuel combustion (fuel dilution actually increased). It also added 200ppm of P. It did not affect bearing wear metals like Techron does.

I have also been using FP Plus in the fuel for about a year (not combined with MMO) in the same equipment with different engine oil and filter. Once again, I can't measure FI cleaning capability accurately, but the engine seems to idle more smoothly and seems more responsive. It does not seem to be as good as MMO for UCL properties though in two of my vehicles (noisier). Based on 1 UOA, I think FP+ may actually be improving fuel combustion (fuel dilution improved dramatically). It did not appear to increase bearing metal wear on the UOA.

It's too difficult for me to comment on fuel economy since I often interchange between gasoline and E10. I will comment that I think E10 is junk. Is that politically correct enough, or should I edit?

I currently continue to use MMO in a S2000 for UCL properties. But I use only FP+ in my Tundra and G35 for the rest of the benefits that it offers.

 

[kingrob]

Here, you can find MMO at just about any store that has an automotive section, no matter how small. Grocery stores, gas stations, dollar stores etc. I've found Dollar General has the best price on it, even compared to Wal-Mart. I doubt you have DG in Canada, though. Keep looking, it's worth finding.

But do as Frank said and use another dedicated fuel system cleaner first, as MMO doesn't seem to initially hit your fuel system hard unless you overdo it, at which point you risk fouling your plugs up. Use something like Gunmout, Regane or STP concentrated formula, then use a couple of ounces of MMO every other fill up or so. You should never have a fuel related issue afterwards, barring a particularly bad batch of petrol.

 

[Ndx]

Thx guys.

Im just worried about Increased fuel dilution with MMO
And the 200ppm of P.

 

[JHZR2]

Havent seen any issues with fuel dilution when using MMO, in UOA results.

I have seena marked decrease in fuel economy, and what seems to be a reduction in power if dosed too heavily. Dose sparingly...

 

[Gary Allan]

Yeah. If you're into routine usage, don't over do it. The producer has configured the recommended dosage to where the incidence of negative side effects is minimized. Probably the real beneficial (the envelope of benefit- however great or small, if you will) treat rate is about 1/2 that (my speculation).

I think a few oz's added to a Seafoam intake treatment would prove intersting. Just a few oz of MMO would surely add to the smoke screen effect. If it was done a day or two before a routine plug change, you could gauge the effects a little better in terms of fouling.

 

[goixiz]

Dollar general - $2 for 16oz

 

[Turk]

I just poured on 8 oz. of MMO in 25 gallons of gas before I drive 10 HOURS tomorrow.

4 hours straight, then an hour, another hour and back home another 4 hours straight.

 

[wander2039]

I put MMO in the gas at least once a month. You'll find on the first dose bad gas mileage but will improve after the next tank. I'd wind er up a few times to help it along.

 

[Craftsman]

Originally Posted By: Ndx
one problem ... I was just searching ... And I can't find a place in CA. that is selling MMO.


MMO is nearly impossible to find in Canada. If you can find it, it's two to three times as expensive as in the US. So, as I travel to the US for business time to time, I drop by the local US Walmart and pick-up a bottle or two...

 

[Westerly]

I've heard that MMO can foul emissions controls like the O2 sensor and possibly damage your catalytic converter.

I would trust the engineers that made my vehicle over the suggestions of folks on forums like this when it comes to additives.

Definitely you have nothing to lose by using an approved additive like Chevron Complete Fuel System Cleaner or Gumout Regane. They are safe when used as directed and contain no additives that will coat critical sensors or the substrait of your converter.

When it comes to cleaning up carbon on your fuel system components specifically formulated approved gasoline detergents are the best way to go. PEA is one of the very best and is in both Chevron Techron Complete and Gumout Regane in suffucuent quantities to safely and gradually clean injectors, intake valves and combustion chambers.

 

[demarpaint]

MMO if used in gas as directed won't hurt anything. I've been using it for many years w/o any problems. But anything used in excess is not good. MMO is not as good a cleaner as the products you've mentioned, it is more suited for keeping things clean and a very good top oil.

Hi Westerly- are you anywhere near Lake Saint George in ME? I went there in the late 60's as a kid, it was a beautiful place!

Frank D

 

[Gary Allan]

Quote:
I've heard that MMO can foul emissions controls like the O2 sensor and possibly damage your catalytic converter.


You have heard wrong. Or rather ..I would speculate that you could find very few instances of unconfirmed claims along side millions of silent non-events.

 

[Jax_RX8]

Originally Posted By: Gary Allan
Quote:
I've heard that MMO can foul emissions controls like the O2 sensor and possibly damage your catalytic converter.


You have heard wrong. Or rather ..I would speculate that you could find very few instances of unconfirmed claims along side millions of silent non-events.


Well put.

 

[Audi Junkie]

Why not burn some and see how much deposit it leaves vs something like 2-cycle oil, which is formulated to modern specs. I would not use MMO compared to 2C. Would you run 2C equipment on MMO? No, because it's not even close to the same quality.

 

[Jax_RX8]

Originally Posted By: Audi Junkie
Why not burn some and see how much deposit it leaves vs something like 2-cycle oil, which is formulated to modern specs. I would not use MMO compared to 2C. Would you run 2C equipment on MMO? No, because it's not even close to the same quality.


Depends on your definition of quality.

Fuel additives range from almost total cleaners (Techron/Regane) to almost total lubricants (2-cycle oils).

If you are looking for maximum lubrication a 2-cycle could be your "quality";

If you are looking for maximum cleaning then Techron, BG44k, Regane, etc could your "quality";

But if you are looking for a pretty good cleaner and lubricant in one product for use on an ongoing basis to keep things well lubed and cleaned up all the time, then I would suggest that MMO could just be your definition of "quality" - it is mine.

 

[Gary Allan]

Ooooo ..good argument

 

[DmanWho]

Originally Posted By: Ndx
...Im just worried about Increased fuel dilution with MMO
And the 200ppm of P.

I worry about the use of Chevron gas w/Techron contributing to fuel dilution. I believe that adding MMO may help to alleviate it.

 

[Westerly]

Originally Posted By: Gary Allan
Quote:
I've heard that MMO can foul emissions controls like the O2 sensor and possibly damage your catalytic converter.


You have heard wrong. Or rather ..I would speculate that you could find very few instances of unconfirmed claims along side millions of silent non-events.


Does MMO specifically state on the product that it is "safe(will not damage ) for o2 sensors and cat converters"? when used as directed?

 

[Jax_RX8]

Originally Posted By: Westerly

Does MMO specifically state on the product that it is "safe(will not damage ) for o2 sensors and cat converters"? when used as directed?


Yes

 

[Crashbox]

Before I started using FP I used to use MMO in the gas quite often. In fact, years ago right after I got my free '71 Dodge Dart it had a near-misfire at idle, sorta like a burnt valve; a few tanks of MMO-fortified gasoline cleared it up. No kidding.

IMO MMO works and is relatively inexpensive.