---
product_id: 259792440
title: "MM12R (16oz)"
brand: "marvel mystery oil"
price: "€ 52.71"
currency: EUR
in_stock: true
reviews_count: 5
category: "Marvel Mystery Oil"
url: https://www.desertcart.gr/products/259792440-mm12r-16oz
store_origin: GR
region: Greece
---

# Boosts fuel efficiency by cleaning injectors Enhances cold weather starts Prevents valve sticking & engine clatter MM12R (16oz)

**Brand:** marvel mystery oil
**Price:** € 52.71
**Availability:** ✅ In Stock

## Summary

> 🚗 Unlock peak engine performance with every drop!

## Quick Answers

- **What is this?** MM12R (16oz) by marvel mystery oil
- **How much does it cost?** € 52.71 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.gr](https://www.desertcart.gr/products/259792440-mm12r-16oz)

## Best For

- marvel mystery oil enthusiasts

## Why This Product

- Trusted marvel mystery oil brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Oil Fortifier:** Strengthens engine oil to prevent sludge and acid buildup
- • **Engine Guardian:** Prevents valve sticking and reduces engine noise, extending spark plug life
- • **Cold Start Champion:** Promotes effortless starts even in freezing temperatures
- • **Eco-Friendly Formula:** Safe for catalytic converters and oxygen sensors, protecting your ride and the planet
- • **Fuel Injector Savior:** Cleans and lubricates fuel injectors & carburetors for smoother rides

## Overview

Marvel Mystery Oil MM12R (16oz) is a premium multi-use lubricant that cleans fuel systems, protects engine components, and improves fuel economy. Safe for catalytic converters and oxygen sensors, it prevents varnish, sludge, and acid buildup while enhancing cold starts and extending spark plug life—making it a must-have for any vehicle owner aiming for longevity and efficiency.

## Description

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. Added to oil it prevents valve sticking and clatter, fortifies properties of engine oil, prevents breakdown caused by extreme temperatures, reduces and prevents acid and sludge formation and promotes easier cold weather starts.

Review: This is great stuff. Use in gas or oil for extra lubrication. Stop engine smoking
Review: Saved my smoky lawn mower!, great product!

## Features

- Brand: Marvel Mystery
- Refer to the packaging for information on use
- Volume: 16 Oz
- Excellent Pick for you

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0009JKGKG |
| Best Sellers Rank | #190,903 in Beauty ( See Top 100 in Beauty ) #1,897 in Body Oils |
| Brand Name | Marvel Mystery Oil |
| Compatible with Vehicle Type | Car, Truck |
| Container Type | Bottle |
| Customer Reviews | 4.7 4.7 out of 5 stars (566) |
| Global Trade Identification Number | 00077874000122 |
| Item Weight | 1.04 Pounds |
| Liquid Volume | 16 Fluid Ounces |
| Manufacturer Part Number | 50094 |
| UPC | 077874000122 |
| Unit Count | 1 Count |
| Viscosity | 5W-30 sae_grade |

## Product Details

- **Brand:** Marvel Mystery Oil
- **Liquid volume:** 16 Fluid Ounces
- **Package information:** Bottle
- **Vehicle service type:** Car, Truck
- **Viscosity:** 5W-30 sae_grade

## Images

![MM12R (16oz) - Image 1](https://m.media-amazon.com/images/I/71B0yT-59bL.jpg)

## Questions & Answers

**Q: Do you think this will oil a sewing machine?**
A: I am sure that it will but you can also purchase a smaller container,less expensive oil.Just about any type of oil will do.If it is a difficult spot to access you can get a can of spray oil that comes with a small about 1/8th inch diameter 6" tube that fits into the nozzle and can oil a spot that is hard to reach. Oil is ,of course, a lubricant any oil will do.The lighter an oil is the more often yo may have to oil that particular part.Many years ago when I was in High School I made a salad bowl on the Wood Lathe.We had run out stain and I anted to keep the natural wood-look.he next day the shop Teacher brougt in Cooking Oil. That was 52 years ago nd I still have that Sala Bowl and every few years I apply more oil.Now I use Vegatable Oil. I hope this may help You.

**Q: I think i have a clogged oil passage will this product break it up and allow the gunk to pass through?**
A: I found this to be pretty amazing stuff . I had a VW bug (1600cc engine) stored in a back shed for 25 years that I changed the oil and added a pint of Marvel Mystery oil in the change (VW's take 2and1/2 quarts in the change), put some gas down the carb , turned the engine over two or three times and the darn thing fired right up. I don't know if it was luck, German engineering or MMV but the engine kept smoothing out the longer it ran and I'm sure the MMV had something to do with that . To now answer your question , I really can't tell you , but from my experience this stuff is well worth a try and it definitely won't hurt. The price is right. Good luck.

**Q: I have a 2005 Chevy diesel that smokes sometimes, especially after idling. I was told this might help. anyone tried it for that? how'd it work?**
A: I would tend to say not likely. It is a good high quality high detergent oil that is used to help clean deposits out of the engine, but based on the limited info given it sounds like you may have worn out engine parts. It is a great oil for many uses, but I suspect you have deeper problems.

**Q: Can i use mmo for my car tucson 2012 of diesel crdi  engine?**
A: There are tests published that this product isn't a great thing to add to diesel fuel. The packaging says it's fine, but there are independent tests showing it lowers lubricity of fuel which is hard on top end and injectors. Check out archoil 6200 or revx instead for this use.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by D***. on 10 November 2025*

This is great stuff. Use in gas or oil for extra lubrication. Stop engine smoking

### ⭐⭐⭐⭐⭐ Review
*by A***M on 1 January 2023*

Saved my smoky lawn mower!, great product!

### ⭐⭐⭐⭐⭐ Review
*by A***R on 13 October 2023*

Works very well for gdi motors, which run well as faster speeds. This is designed for gas asperated, ekectric throttle body fuel enjection motots.would definitely buy it again.

## Frequently Bought Together

- Marvel Mystery Oil CD 2 MM12R - 16 oz., RED
- Gumout 800002231 Carb and Choke Cleaner Jet Spray - 14 oz.
- Gumout 5072866 Starting Fluid - 11 oz.

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---

*Product available on Desertcart Greece*
*Store origin: GR*
*Last updated: 2026-06-04*