MMO (again)...

[chaindrive]

i've heard of guys using MMO every time they fill up.

i'm wondering if that 6 oz. or so could cause damage to the oxygen sensor or catalytic converter over time.

any thoughts on this?

 

[JHZR2]

I believe mmo has low enough sulfur to be OK for ulsd. It should be fine.

 

[StevieC]

Originally Posted By: chaindrive
i've heard of guys using MMO every time they fill up.

i'm wondering if that 6 oz. or so could cause damage to the oxygen sensor or catalytic converter over time.

any thoughts on this?

to BITOG!

You will be fine...

 

[5sfe91]

First post in 5 years nice!

 

[Panzerman]

I have dumped a whole quart to a full tank of gas in my 2006 Dodge with a hemi about a year ago, and nothing bad happened. It was after a accidental submersion in water, if you are wondering why I would do something like that. Ran fine. No lights came on, after the initial lights from the water, went out, that is.

 

[demarpaint]

I copied and pasted this from the other day. HTH

Some people notice increased mpg some don't. I use it to keep the fuel system clean, lubed, and for its UCL benefit. My E-150 would typically sit for weeks sometimes months at a time without being started it up. Adding MMO to the gas also prevents flash rusting inside the combustion chamber. That is another perk for me.

Originally Posted By: demarpaint
MMO is a UCL and it softens carbon. As of today my 88 E-150 has been using MMO since just about new. The cat converter is original.

My 93 Aerostar has been using it since I bought it with about 50K miles, it has close to 190K on it. The cat converter and O2 sensor is original. As far as I can tell it doesn't harm them, and I've run some pretty large doses of it more than once in both vehicles.

I am also using it in my 08 Jeep Liberty, since about 300 miles, and plan on doing so as long as I own it.

 

[crazyoildude]

MMO is great stuff and i have been using it in all my personal engines and i put some in the gas of the engines we build

 

[demarpaint]

Originally Posted By: crazyoildude
MMO is great stuff and i have been using it in all my personal engines and i put some in the gas of the engines we build


Pretty impressive coming from an engine builder!

 

[hardcore302]

I use it in most of my fill ups. I like the UCL properties as well as a minor cleaning agent. I will still use Gumout Regane ( a strong cleaner) every oci. I bought my car new, so no need to put it in the crank case.

 

[Jimmy9190]

I add 6 oz. MMO to every fuel fill, which is almost always right about 15 gallons, so I am following the 4 oz to 10 gallons recommended dose. It works great for me and I have had no cat, O2 or any other emissions problems at all.

 

[CourierDriver]

I am now using Pennzoil 2 cycle oil with tcw3, does the same thing in ur gas and does not hurt the cat or any other sensor. Use 1 ounce to 5 gallons of gas.

 

[chevrofreak]

Originally Posted By: CourierDriver
I am now using Pennzoil 2 cycle oil with tcw3


You keep saying this, but I am not sure that you know what you are saying.

 

[badtlc]

I read a post on the MMO boards (either rich kelly or another admin) where the MMO rep said MMO would help prevent valve deposits on a DI engine when used in gas.

I always had my doubts but that pretty much proved the people over at MMO don't really have a clue.

 

[andyd]

I use MMO only occasionally in my cars' fuel. But I have been using it religiously in my small engines. Less carb troubles, easier starts. To be truthful, I dunno if its a placebo effect or not, but I love the wintergreen smell.

 

[Ronn]

Originally Posted By: badtlc
I read a post on the MMO boards (either rich kelly or another admin) where the MMO rep said MMO would help prevent valve deposits on a DI engine when used in gas.

I always had my doubts but that pretty much proved the people over at MMO don't really have a clue.


You read wrong

Here is the thread and Kelly's post:

MMO thread....Kelly

The additional of ethanol to gasoline reduces the lubricity that is normally present in the fuel. It makes it a dryer fuel and therefore may affect the seals. Using Marvel Mystery Oil replaces the damaging effects of the ethanol by replacing the lost lubricity. It also has a mild seal swelling additive to help keep the seals soft and pliable.

Using Marvel Mystery Oil should not negatively affect your DI system. After all, many diesel owners use Marvel Mystery Oil in their DI engines.


If there is another post there that says MMO helps prevent deposits in a DI Engine, I'm not aware of it. If you can find it there..post it here.

 

[CharBaby]

Originally Posted By: andyd
I use MMO only occasionally in my cars' fuel. But I have been using it religiously in my small engines. Less carb troubles, easier starts. To be truthful, I dunno if its a placebo effect or not, but I love the wintergreen smell.


I love MMO in carb'd engines. I sware it's not the placebe effect. I don't notice anything different in EFI.

 

[demarpaint]

I think Carb'd engines have the most to gain. Just ask c3po.

 

[c3po]

Originally Posted By: demarpaint
I think Carb'd engines have the most to gain. Just ask c3po.


I have been using MMO in my Carburated Engine for 15,000 miles now and my carburetor runs fantastic.

Throttle Response is GREAT.
No Hesistation.
No Backfiring.
No Stalling.

I just think MMO keeps carbs clean and well Lubed.

Before using MMO in my carburetor I was ready to get rid of the carb and put on Fuel Injection, but MMO has made my carburetor very reliable with no driveability issues.

 

[badtlc]

Originally Posted By: Ronn

You read wrong

Here is the thread and Kelly's post:

MMO thread....Kelly

The additional of ethanol to gasoline reduces the lubricity that is normally present in the fuel. It makes it a dryer fuel and therefore may affect the seals. Using Marvel Mystery Oil replaces the damaging effects of the ethanol by replacing the lost lubricity. It also has a mild seal swelling additive to help keep the seals soft and pliable.

Using Marvel Mystery Oil should not negatively affect your DI system. After all, many diesel owners use Marvel Mystery Oil in their DI engines.


If there is another post there that says MMO helps prevent deposits in a DI Engine, I'm not aware of it. If you can find it there..post it here.



No, I did not.

http://www.marvelmysteryoil.com/index.php/forums/viewthread/441/

When asked if MMO would help prevent deposits....

"Yes, add MMO to every tank of gas and it will help minimize deposits. Also, GM has designed their DI cars to run on “Top Tier” gasoline. Check your owner’s manual for more details. The manual should help clarify fuel requirements. All gasoline does contain minimum levels of deposit control additives as required by the EPA. However, gasoline deposit control additives can vary from the fuel blender. As for adding MMO before an oil change, be careful not to overfill the crankcase. Yes, MMO will cut through sludge, however, a new car should not need an engine flush yet. Hope this helps! "

 

[demarpaint]

Just wondering since I don't own a DI engine and know little to nothing about it. If controlling deposits can't be done then why does GM recommend top tier gas to minimize deposits? Surely in a DI engine a UCL would have some value wouldn't it?

Seems Mr. Kelly is truthful in saying that a new engine shouldn't have sludge yet, or need a flush.