How many of you out there added the marvel mystery oil after break-in? That has always been a good synthetic additive for rotaries. I know I am a believer!

Notice I said additive because all conv. oil has additives that are synthetic in their oils.

 

you lost me

 

I run Marvel through the top end of my boat motor at the end of every season. Fire it in the driveway, kick the idle up and pour it straight down the carbs. Makes for huge plumb of smoke out the exhaust. Helps to keeps the rings, walls, bearings, etc... good and wet during the winters wait till next summer.

 

that is a sweet motor

 

Not sure what your point is about Marvel being synthetic; it was formulated about 90 years ago. Its original purpose was to prevent and/or remove varnish and gum deposits resulting from the less-than-ideal gasolines of the time. So, it's mostly solvent, with a bit of very lightweight oil. The other predominant component is phosphorus, which I recall is very bad for catalytic converters and would doubly avoid given the higher-than normal oil consumption of the rotary.

The problems which the product orginally addressed were long ago remedied by improved gasoline and oil formulations.

It does smell nice, though

 

Does anyone here run MMO in their oil or fuel? if so, did you feel a difference when using it?

 

Why would you want to use MMO in your Renesis?

1.3L

 

I've never even heard of it!!!!

 

It's a light petroleum used to clean the inside of dirty engines. It leaves little or no rsidue. A little bit won't hurt anything. Too much will thin your oil. Shouldn't need it in a new car.

 

its in a red and black can

 

trying to see if it'll clear out the carbon buildup???

 

Overall, MMO is heavier than gasoline, has longer chain molecules, less hydrogen per molecule, and would likely build up carbon if it was burned, not clean it out.

S

 

Probably should not use it in an engine that burns oil like the rotary.

 

good to know, thanks *avoids MMO*

 

althought i did use it to as a piston soak in a oil burning saturn. worked rather well.

 

that's what I use it in, a saturn

I was wondering though if it could be used to supplement the use of oil by the engine, I know that some ppl put 2-stroke oil in the fuel for their RX-7 and then disconnect the metering pump to keep it from burning so much.

MMO is actually intended for cleaning out engines so I don't see why it would hurt anything.

 

MMO is not something that people should be adding to their engines to try to clean them out, primarily lubricate them, etc. At least not in a rotary. MMO is used by some rotary engine builders when assembling engines as it works as a good initial lubricant and rust preventer during assembly and on the initial first startup. The first time you start the engine up, the little bit that was literally wiped onto the surfaces is burned off and that's the last of it. Even then you don't necessarily use MMO on all of the parts during assembly. Unless you are building engines all day, you don't really need it. Use a good oil, good oil filter, maintain regular oil changes, and if you are concerned about interior engine lubrication issues, premix with 2 stroke oil. That's all you'd ever need to do and the premix part is optional.

 

The one and only time that I used MMO was specifically to thin the oil. Car (not an 8) was parked overnight in temps that were about 50 below and the straight weight oil was as thick as honey. MMO was the only chance at getting started. It did thin the oil considerably.

 

marvel mystery oil isn't that much different from dexron atf. it's an old school method to add in a bit of dexron to "clean up" the motor. not needed anymore. oils nowadays have enough detergents to do the job...that's if you change it regularly.

 

Be warned: Too much ATF or long duration in the engine is a big no no for any engine

 

I'm confused about what people think of Marvel Mystery Oil.

I used it and it seems to work. Not only that, but it IMPROVED my gas mileage for some reason. I know that's a tall claim, but I swear its true in my case. I went from an average of 17.5 miles per gallon ( city and highway) to around 19.5 (sometimes better than 20/ starting to get above that mark more often) miles per gallon.

Now I know many people have gas mileage issues with their RX-8, but I think some factors are:

1. How do you drive?

If you play racer X than yeah, the RX-8 is going to suck down all the gas you give.

2. High Octane.

The octane makes a difference. Putting cheap gas in the RX-8, gives you bad performance. But, I side note is that I've had good results with octane boosters. Xylene, and some others seem to work.

3. Using NEUTRAL whenever you can.

Learning to use shift to neutral down hills or when you coming to a red light (whenever your just driving and not wanting performance), seems to help. You need a little skill to develop this technique, but it seems to pay off.

4. Luck

Some people just have a better engine or the mechanics working on it are better. If you maintain your engine. Oil, oil filter, etc... and perhaps some mods, cold air filter, etc... seem to help as well.

Anyway, back to Marvel Mystery Oil (yeah, what a crazy name). The stuff was made to add to your gas and oil. It seems to burn well and not create any deposits and increase performance.

I don't know about using it as an oil additive, because there are so many other products. But as a gas additive, it appears to work well. I've also used it with octane boosters with lower octane gas and with high octane gas. Interestingly, I was able to get results with the lower octane gas, octane booster, and MMO added.

I hope some experts or "old timers" could add more opinions about this stuff and why it might work.

 

Downshifting to slow down to a stop light will burn less fuel than shifting to neutral.

 

I use MMO every day.
To lube my air tools (impact/Air Ratchet)
Whats the big deal?

 

Used it in a car I used to own for upper cyl lubrication. Don't know if it really did any good or not but it did no harm. As far as the rotary, one would have to find out if it leaves any build up since they burn pretty hot. I don't know if I need to use premix or not but I might use it until I get the new flash. I have only 750 miles on the car right now.

 

that's the MMO tool oil man...i have that stuff for my tools too. but i stopped using it b/c it killed my 3/8 impact gun and 3/8 mini air ratchet. got them fixed and stopped using MMO, 2 years later, NO PROBLEMS. i'm never going to oil my tools again...