Marvel mystery oil
 

Ok guys just wanted to put this up
I have been using marvel mystery oil in my car and I'm telling you it sounds better and gets better gas mileage, my question is this
Does anyone use this in there gas for a older 1988 150 outboard engine? Does sun one use it? Just wondering

If your adding it to your fuel I'd be careful. I'm pretty sure it's not oxygen sensor safe.

Truthfully, unless it specifically says it's ok for 2 stroke engines I would not use it. Why take chances on something that costs thousands of dollars? Makes no sense to me. :head:

Your right I'm going to check the directions on the bottle if it says nothing about 2 strokes then I'm not going to use it, but I will continue it in my car, does anyone use it in there car? I'm telling you it gets better mileage

Be REAL careful adding anything to a 2 stroke... Thinning the fuel leans the air/fuel mixture

Back in the day my mom had a Ford Explorer that the valves pinged like crazy in. Put some Marvel Mystery Oil in it and it never made a sound. Stuff does do wonders however I don't believe it's safe for 2-strokes.

My dad was a mechanic for 50 yrs. incl. time in the Navy wwll. he always said the best thing you could do for your car/truck was change the oil and grease it every 3k miles. He didn't like any additives. Said some would loosen crud so it ended up causing problems. On older engines some of that crud takes up slack and prevents bypass etc.
So I never use them, as my vehicles have mostly been older high mileage ones.
recently had a friend start talking about adding power steering fluid to oil. (old trick to quiet lifters)
I started to tell him, when he said it cleaned up the engine inside really well.
he said "let me finish. For an engine rebuild, prep by three ps fluid treatments at 3 oil changes will prep the engine for a rebuild. inside parts will be shiny as new saving time on cleaning for rebuild."

my car always seems to run better after I wash and polish it ; )

I agree 100%! But I 8always use Mystery oil when I fog the motor, works great

You fog it with m m o

pull the plugs, fill each hole with oil, then turn it over I am done!! Has always worked for me

You ought to be OK using MMO for fogging Joe. and for loosening rusty bolts and freeing locked up motors or equipment. Maybe not so good for mixing with motor crank case oil.

I got curious and googled MMO.
An NTSB report says that it is composed of 75% mineral oil, 24 % Stoddard solvent and 1% lard.

The MMO product safety data sheet lists it as:
60-100% mineral oil, 10-30% Stoddard solvent (white spirit),
Tricresyl phosphate 0.1-1.0%, Ortho Dichlorobenzene 0.1-1.0%,
and Para Dichlorobenzene <0.1%.
The last 2 being benzene compounds (in very small amounts)

With that much mineral oil thinning the motor oil, the crank ought to turn easier and faster. Is that good? I don't know.
imho with some car/truck engines already using 5w-30/40w oil further thinning might not be good. some solvents etch metal. I'm going to stay away from it, as there are cheaper ways to get mineral oil and Stoddard if I want to use them for something.

Spicy mustard........makes it smell like a barbecue when it burns......

I bought my 86 V with a Mercruiser 4.3l vortec motor that sat for a few years and it was stuck pretty good,, filled ea cyl with MMO . let it sit for a few weeks...... worked her gingerly to free... Purrs like a kitten now!

I'm telling you it's good for gas in your car Last time I fueled up I checked the mileage and got 37 mpg I never got that the most I got was mpg

I used to use it in my cars too. you would get much better gas milage after the 2nd or 3rd fill-up.. works.. however you can let your car sit for any periods of time or when you start it blows some smoke. I would imagine its from the oil/ gas separating?