Marvel MM12R Mystery Oil - 16 oz.

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534Total Reviews

Engine & Oil

n/a

Company Review Grade:

Marvel

2,288 Total Products

Marvel MM12R Mystery Oil - 16 oz.

Analyzed on

Sold by Marvel

D

Fakespot review grade

D

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Pros & Cons

Update Pros and Cons

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Pros

It is also useful in putting in the crankcase a couple of hundred miles before an oil change. I also use it for a general light lube oil and when mixed with a little lacquer thinner it frees rusty bolts about as good as anything else i've tried. Add 3... Read More

It is incredible. Best fix ever. For those things, it's awesome. Will buy again. Great lil product.

Cons

Mmo is a bad product & terrible customer -tech support! Much better deals out there than this seller. It was allegedly supposed to help with the carburetors and cylinder heads. No change in performance.

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Highlights

The AI used to provide these results are constantly improving. These results might change.

Quality

The red goodness gave me an excellent starting engine with a solid functional choke and even better a smooooooooth perfect running idle.

Great product, does the trick for gas mileage, cleans deposits, and restores compression

Ethanol leaves behind very dirty deposits in your fuel lines, engine and over time will clog your jets on the fuel injectors.

Waited several days, then fired it up again, the valve came loose about 30 seconds after start!

Price

This genuinely saved my family over $4000.

Saved me dropping $500 on another power washer.

I expected nothing, but for $10, why not.

I was told that another procedure which required dismantling the engine was next at a cost of $5,000.

Packaging/appearance

Looks like snake oil, but i'm sold.

Competitiveness

It won't harm your engine or anything, if not it's even better.

Nothing, i mean nothing works as good as marvel mystery oil.

It is not nearly as effective as more modern ones like lucas.

We used bardahl engine flush at oil change as recommended by bardahl and switched to 0-40 synthetic oil.

Overview

How are reviewers describing this item?
great.

Our engine has detected that Amazon has altered, modified or removed reviews from this listing. We approximate total reviews altered up to 1039.

Previous analysis of this listing was an D grade.

Our engine has profiled the reviewer patterns and has determined that there is high deception involved.

Our engine has analyzed and discovered that 43.1% of the reviews are reliable.

This product had a total of 534 reviews as of our last analysis date on Mar 28 2024.