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Pros & Cons
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.
Highlights
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.
Helpful InsightsBETA
Posted by a reviewer on Amazon
I have a 97 toyota corolla with the infamous oil burning issue
Posted by a reviewer on Amazon
I was using about a half quart of oil a week before i put it in my crankcase i put it in about a week ago and my oil level is still at full
Posted by a reviewer on Amazon
I wasnt expecting it to do this much good
Posted by a reviewer on Amazon
We put about 240k miles on the caprice
Posted by a reviewer on Amazon
Most people we knew with gm diesels during that era did not get that kind of miles on their motors
Posted by a reviewer on Amazon
When hurricane sandy hit us and we ran out of gas i siphoned gas out of the small engines in our garage rather than wait in line for four hours
Posted by a reviewer on Amazon
Kept us going for a few more days
Posted by a reviewer on Amazon
Problem check engine lights for both variable valve timing actuators sticking
Review Count History
Price History
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