Is Marvel Mystery Oil a good product?

Answer 1

YES! it is a good product. in the gas it lubricates the top-end of the engine and dissolves carbons. it also keep injector tips clean from varnish to be more efficient in these gas crisis days. it lubricates valves and the fuel pump which has nothing to lube it internally. i say, yes, it is good to use MMO, at least occasionally if not in every tank!

I will second this product, it is a good product when used as directed.

It's advised, when using MMO (Marvel Mystery Oil) in your crankcase (oil) to replace 10-20% of your oil with MMO. Generally, you replace 1 quart of your standard oil, with 1 qt (or even a pint, if you fear of extremely dirty oil) of Marvel Mystery Oil.

Then, for the gas treatment, all it takes is 4 oz. per 10 gallons....Note: The smallest bottle they have is 16 oz. so you will have to do some measuring, using a measuring cup, or a graduated cylinder so you can accurate pour the dosage into your fuel tank.

It has been noted on their site and forum, that "over dosing" on MMO isn't really possible, it will simply mix with the fuel that's already in there...BUT they do recommend driving the vehicle as normal, and filling up the tank at 1/2 tank, two times before adding any more MMO to the fuel.

I tested this oil, myself. I went from 19.5 mph to 11.8 mph and I lost horse power. I'll never use this oil again. 1995 F150 5.0L [6oz oil to 19 gal gas.]