Quick Answer: Is Marvel Mystery Oil Any Good?

Can Marvel Mystery Oil Unseize an engine?

Jeff Del Papa kinda nailed it as far as what Marvel Mystery Oil is used for with respect to a seized engine.

The MMO will allow you to remove the pistons from the cylinders so you can fully disassemble the engine to rebuild it properly..

Does Marvel Mystery Oil do anything?

Marvel Mystery Lubricating Oil is safe for catalytic converters and oxygen sensors. Added to gas it cleans and lubricates fuel injectors and carburetors, improves gasoline mileage, extends spark plug life, reduces and prevents varnish and gum build-up.

How long does Marvel Mystery Oil take to work?

around three hoursMarvel Mystery Oil can be sprayed or dripped around the edges of your spark plug, eating away the seized portions of metal on metal contact. You should wait around three hours for it to work, then you tighten and loosen the plug until it comes out.

Which is better seafoam or Marvel Mystery Oil?

Marvel Mystery Oil has better hot compression performances. Sea Foam is a better fuel stabilizer than Marvel Mystery Oil. Marvel Mystery Oil prevents oil from thickening in sub-zero temperatures. Sea Foam is more expensive than Marvel Mystery Oil.

Does Marvel Mystery Oil damage engine?

Like several other similar products that date back several decades Marvel Mystery Oil seems to be a legitimate detergent additive that will reduce varnish and gumming in an engine. … The best thing you can say about any additive is, first, do no harm.

Will Marvel Mystery Oil quiet lifters?

In its attempt to prevent valve sticking, Marvel Mystery Oil works perfectly in getting rid of lifter noise. It will prevent sludge build-up in newer engines and remove built-up sludge in the older ones. This helps the engine run smoothly and efficiently.

How long should you leave Marvel Mystery oil in crankcase?

5 mins*Usually* this involves doing it right before an oil change, dump the flush into the crankcase with the old oil and IDLE it for ~5 mins.

Will Marvel Mystery Oil cause leaks?

Marvel Mystery Oil was made for the aircooled Franklin engine. MMO thins oil. If you have original gaskets, thicker oil will stay put but thinner oil will leak out.

When should I use Marvel Mystery Oil?

Marvel Mystery Oil can be added to engine oil 300 to 500 miles before your next oil change to supplement sludge removal and enhance engine cleaning.

What is the viscosity of Marvel Mystery Oil?

2.6 cStThe viscosity was 2.6 cSt. However, what concerned me most was the flashpoint of 160 degrees Fahrenheit. Basically, when added to oil this is just evaporating at operating temperature. So I have come to the conclusion that MMO is fantastic for gas.

Does Marvel Mystery Oil clean sludge?

Marvel Mystery oil became well known for cleaning these jets and increasing engine performance. … You can flush sludge out of your engine by regular use of the product with each oil change.

Does Marvel Mystery Oil increase octane?

It’s supposed to be a cleaner, lubricant, and an octane boost. It does to fuel injected engines what the Marvel Mystery Oil did to carbureted engines. It also has some protective effect due to the increased ethanol in today’s gas. I trust it not only because of my own experience with it.