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The 8 Best engine oil fluid additives of 2024

Are you trying to find engine oil fluid additives among various brands on the market but aren’t sure where to begin? To assist you in finding the right one, we’ve put together a list of the 7 best to help you pick the perfect one!

We investigated and evaluated a number of the top-selling engine oil fluid additives on the market in order to create our list of the best. Making a decision among the many options available is never simple. There are an infinite number of models available, each with a distinct price. And as you’ll find out, the best options aren’t usually the ones you imagine! This comparison is rich and relevant because of the numerous factors that were employed. You will find products featured in this ranking not only based on their pricing but also on their features and other customers reviews. To write this review, we completed 11 hours of research and did 33 engine oil fluid additives tests. You won’t need to pick products at random any more. If you’re unsure of what to look for, browse our list and consult the buying guide!

An overview of our top picks

Table of contents

The best engine oil fluid additives you can buy today

SaleNo. 1
Lucas Oil 10001 Heavy Duty Oil Stabilizer - 1 Quart
  • The world’s #1 oil additive
  • Formulated with 100% petroleum
  • Suitable for new engines
  • Multi-use versatility
  • Trusted by pros to keep engines running smoothly under the most demanding conditions
  • Available in 1-quart and 1-gallon bottles
No. 2
Liqui Moly 2009 M0S2 Anti-Friction Engine Treatment - 300 ML
  • Motor oil additive - Liqui Moly MoS2 anti-friction (300 ml. Can).Fit Type: Universal
  • Forms High load-bearing film of lubricant on all friction surfaces
  • You will be surprised at how much better your engine sounds and how controlled it will be even at very high RPM
  • Flash point: 181.0 degrees_celsius
SaleNo. 3
LIQUI MOLY Oil Additive Cera Tec 3721 Ceramic Wear & Tear Protection for Petrol & Diesel Engines Smoother Engine Performance, Less Friction & Lower Fuel Consumption 300 ml
  • Mixable with all commercially available motor oils
  • Stable even under high thermal and dynamic permanent loads
  • No deposits and absolutely compatible with all commonly used filter systems
  • Resists extremely high and low temperatures
No. 4
Marvel Mystery Oil MM12R - 16 Fl Oz. (Pack of 2)
  • Kit Includes (2) 16oz. Bottles of Marvel Mystery Oil additive
  • Cleans and lubricates fuel injectors and carburetors
  • Reduces and prevents varnish and gum build-up
  • Prevents valve sticking and clatter
  • Prevents oil breakdown caused by extreme temperatures
No. 5
AtomOil Oil Additive for Car Engine and Protection | Nano Technology Motor High Mileage Treatment | Atomic Scale Protective Oil Treatment, 16 Oz. Bottle
  • ATOMIC SCALE PROTECTION: Formulated with nano-engineered additives, this treatment is the next generation in superior performance. It gets rid of friction and wear by creating boundary lubrication that eradicates direct surface-to-surface contact. Includes one 16 oz. bottle.
  • SUPERIOR HIGH-TEMP PERFORMANCE: Experience engine thermal stability unlike any other. AtomOil's engine oil treatment is superior to other treatments for motor oils with a stellar performance in high-temperature environments.
  • EXTENDS SERVICE INTERVALS: Extend the service life of your engine. Using this treatment during an oil change promotes energy savings and protection of critical engine parts. Add the entire bottle to 4-5 quarts of all varieties of mineral and synthetic engine oils.
  • PROTECTS DURING INITIAL STARTS: Designed with early film activation for unprecedented surface penetration, staying power, and protection from wear damage incurred during cold starts. This engine oil stabilizer ensures every mechanism performs at its peak.
  • STOPS SLUDGE, & CONTAMINANTS: With a durable protective tribochemical film, this engine oil treatment halts deposits like varnish, sludge, and other contaminants from forming on engine surfaces.
SaleNo. 6
Restore (00012 6-Cylinder Formula Engine Restorer & Lubricant - 12.5 oz.
  • Restores cylinder compression
  • Restores horsepower
  • Restores engine performance
  • Reduces oil consumption
No. 7
Bar's Leaks 1010 Engine Oil Stop Leak Concentrate, 11 oz, 1 Pack, Grey
  • Stops and seals motor oil leaks
  • Works with all types of motor oil
  • Restores gaskets; seals to stop and prevent engine oil leaks
  • Compatible with vehicle type: Car
SaleNo. 8
Bar's Leaks Oil Seal Engine Oil Burning and Leak Repair
  • This Premium Quality Synthetic Blend Works With All Types Of Motor/Engine Oil Including Regular Petroleum, High Mileage, Synthetic Blends And Fully Synthetic Formulas
  • Works In All Gasoline And Diesel Engines Including Turbocharged, Eco Boost, Hybrid And Even Racing Engines, Including 3, 4, 5, 6, 8 And 10 Cylinder Engines In All Cars, Trucks, Vans And Suv'S
  • Can Also Be Used In Heavy-Duty Applications As Well As Tractors, Boats, Rv'S, Motorcycles (Including Wet Clutch), Atv'S, Lawn Equipment
  • In Most Cases The Oil Leak Issue Will Be Repaired With A Single Dosage. However, For Best Results And To Prevent The Problems From Reoccurring, Use With Every Other Oil Change, Or Once Per Year
SaleNo. 9
Liqui Moly 2037 Pro-Line Engine Flush - 500 Milliliters
7,120 Consomer Reviews
Liqui Moly 2037 Pro-Line Engine Flush - 500 Milliliters
  • Easy way to clean and flush the oil systems of gasoline and diesel engines
  • Gentle and rapid cleaning
  • Neutral to seals and other materials installed in the engine
  • Compatible with catalytic converters
  • Simple to use
SaleNo. 10
Hot Shot's Secret Original Stiction Eliminator 32 Fluid Ounce Bottle
  • Improved Power, Improved Compression
  • Removed Engine Deposits, Seals Rings Better
  • Neutralized Harmful Engine Acids, Reduced Frictional Drag
  • Prevent Excessive Wear
  • Reduced Lifter and Valve Noise
No. 11
Rislone 4405 Engine Oil Supplement Concentrate with Zinc Treatment - 11 oz, Yellow
  • Prevents Camshaft Wear
  • Reduces Piston Scuffing
  • Increases Engine Life
  • Makes Newer Oils Work In Older Engines
No. 12
Lubegard 95030 Engine Flush, 15 oz.
  • Use before changing oil in gas or diesel engines
  • No harmful solvents to damage seals or gaskets
  • Safely remove accumulated amounts of varnish, sludge and by-products of combustion
  • Premium synthetic blend that contains special detergents and dispersants
  • Prepares engine for fresh oil
No. 13
ZDDPPlus ZDDP Engine Oil Additive Zinc & Phosphorus 2 Bottles
  • PROTECT YOUR ENGINE - Older cars with flat tapped lifters-cam need the added zinc for protection
  • EASY TO USE - Simply empty entire 4oz contents of the bottle to a 4 to 6 quart oil change.
  • PREVENT METAL ON METAL CONTACT - ZDDPlus alters characteristics to prevent metal on metal contact
  • FOR USE ON PRE 1989 AND HIGH PERFORMANCE ENGINES
  • COMPATIBLE WITH SYNTHETIC AND CONVENTIONAL MOTOR OILS
No. 14
XADO engine oil additive - protection for engines - additive for wear protection & rebuilding of worn metal surfaces - Metal Conditioner with Revitalizant 1Stage Maximum (up to 5qt of oil capacity)
  • Engine oil additive restores the surfaces of the engine parts and compensates for the resulting wear
  • Restoration of engine compression | Repair of the surfaces
  • Provides active protection against overload and overheating | Extends lifespan
  • Lowers fuel consumption effectively | protects the engine against wear | Atomic metal conditioner
  • Motor oil additive with Revitalizant | Engine oil additive | Suitable for gasoline and gasoline engines
No. 15
Hapco Products - Limited Slip Additive – 4 oz. (Case of 12)
  • Use to reduce wear, noise and chatter in differentials
  • Provides extreme pressure-wear resistance in any fluid system
  • Does not contain petroleum distillates
  • Will not harm any seals
  • Also safe for: electric motors, hydraulic pumps, moving shafts, power mowers and pillow blocks
No. 16
XADO Highway Atomic Metal Conditioner - Engine Oil Additive & Motor Treatment (Bottle, 7.5oz) (Highway)
180 Consomer Reviews
XADO Highway Atomic Metal Conditioner - Engine Oil Additive & Motor Treatment (Bottle, 7.5oz) (Highway)
  • Compensates Current Wear Of Engine
  • Restores Compression In Cylinders
  • Increases Pressure In Oil System
  • Creates Active Protection System Of Parts From Loads And Overheating
  • Improves Lubricating Properties Of Oil And Tribological Characteristics Of Engine Units
No. 17
Hot Shot's Secret HSSFR332Z FR3 Friction Reducer 32 Fluid Ounce
  • 100% synthetic oil additive that protects engines and improves performance
  • You can use the product in gas or diesel engines, works with synthetic or conventional oil
  • FR3 Friction Reducer increases horsepower and fuel economy up to 5 percent
  • Reduces engine wear up to 43 percent and oil operating temperature
  • 32-ounce friction reducer engine additive reduces lifter and valve noise and restores lost compression
SaleNo. 18
REV X ZDDP Oil Additive - Zinc & Phosphorus
  • Creates an anti-wear layer at friction points to prevent metal-to-metal contact and eliminate wear.
  • Engine break-in where the new camshaft and lifters need extra protection, and ZDDP is perfect for that.
  • Mandatory for all flat tappet engines.
  • Works in both synthetic and standard mineral-based oils.
  • Two fluid ounces mixed with 6 quarts of oil create a ratio of 3000 – 3200 parts per million (ppm).
  • ZDDP protects high-load components from excessive wear and failures.
  • Use in every oil change for maximum protection.
No. 19
REV-X ZDDP Oil Additive - Zinc & Phosphorus (5 Pack)
  • Creates an anti-wear layer at friction points to prevent metal-to-metal contact and eliminate wear.
  • Engine break-in where the new camshaft and lifters need extra protection, and ZDDP is perfect for that.
  • Mandatory for all flat tappet engines.
  • Works in both synthetic and standard mineral-based oils.
  • Two fluid ounces mixed with 6 quarts of oil create a ratio of 3000 – 3200 parts per million (ppm).
  • ZDDP protects high-load components from excessive wear and failures.
  • Use in every oil change for maximum protection.
No. 20
Bar's Leaks Rislone Hy-per Lube Zinc ZDDP Supplement (6 Pack)
  • Prevents camshaft wear
  • Reduces piston scuffing
  • Increases engine life
  • Makes newer oils work in older engines
  • Boosts Zinc and Phosphorous Levels

How to choose a good engine oil fluid additives

Does the idea of finding a fantastic engine oil fluid additives make you anxious? When it comes to purchasing this product, specifically when deciding which model to select, has your head been spinning between options? You are not alone if that is the case. We are aware of the pressure involved in the purchasing process!

Your presence here indicates that you are interested in engine oil fluid additives. Before choosing which product would be the best for your needs after being inundated with information, locate a reliable source with genuine selections. You can get that information from a variety of sources, including buying guides and rating websites, word-of-mouth recommendations from friends and family, online discussion forums where users can share their own experiences, product reviews that can be found all over the internet, and YouTube channels. You can only get the right product through exhaustive analysis. But you realize that’s not always simple. In order to ease your concerns, we have taken the time to develop a list of the top engine oil fluid additives products available right now. You might be wondering how we came up with the list. How was this buying guide developed?

First, we used our algorithms to gather as much reliable data as we could about these products. To verify all the data gathered, we used both artificial intelligence and a lot of algorithms.
Then, our experts used criteria that are recognized in the business to evaluate them according to their quality to price ratio, allowing us to choose the top engine oil fluid additives on the market right now!

The selection of the goods is not arbitrary. Before creating a list, we take into account a number of factors. Below are some of the criteria discussed:

Brand Value: What happens if you choose a dubious brand just because it appears to be a good deal? So the likelihood of receiving a product with a short shelf life increases. That is due to the fact that well-known brands have a reputation to uphold, while others do not. Top engine oil fluid additives brands strive to provide some distinctive traits that set them apart from the competition. So, hopefully one or more of the items on our list will be perfect for you.

Features: Useful features are all you need, not tons of them. We consider the important aspects and select the top engine oil fluid additives based on those.

Specifications: Numbers always help you measure the quality of a product in a quantitative way. We try to find products with higher specifications, but with the right balance.

Quality: A product’s quality may always be quantified with the aid of numbers. We look for goods with better standards that strike the proper balance. The best quality product that gets highly appreciated and recommended by experienced users.

Customer ratings:  Would it be accurate to suggest that the engine oil fluid additives were used by hundreds of customers before you? Superior ratings indicate that many customers had better service.

Customer Reviews: Like ratings,  provide you with accurate and reliable information about the product from genuine customers. Customer ratings are very important to all of us because they contain accurate and reliable information about the customer service we received from several hundred customers.

Seller Rank: This is very intriguing! Not only do you need a good engine oil fluid additives, you also need a product with rising sales that is trendy. It accomplishes two goals. First, the expanding user base proves the quality of the product. Second, given that number, producers must be able to offer greater quality and after-sales support.

Value: You get what you pay for, they say, so consider the value. Cheap isn’t always good and expensive isn’t always bad. However, that does not imply that spending a lot of money on a product that is flashy but underwhelming is a good idea. Before adding them to the list, we make an effort to evaluate how much value you can get for your money from your engine oil fluid additives.

Durability: Durability and reliability are closely related concepts. You will benefit from a strong and long-lasting engine oil fluid additives for months and years to come.

Product availability: Products come and go, and new ones replace the old ones. Most likely, a few new features and required changes were made. What use is it to use a supposedly good product if the maker no longer supports it? We make an effort to highlight products that are current and offered by one or more trustworthy sellers, if not more.

Negative Reviews: Yes, we do take that into account as well! The goods with the majority of bad reviews are filtered out and disregarded when we choose the best-rated one on the market.

These are the standards by which we selected our engine oil fluid additives. Do we end our process there? Hell no. The most crucial fact about us that you should be aware of is that we regularly update our website with current and pertinent information. We have one more layer of filtration since we place the greatest importance on reader satisfaction. Please let us know if any product included here is incorrect, irrelevant, subpar, or simply out of date. We always value your opinions, and we’ll work hard to make any necessary corrections to our list in response to them.

Why should you believe us?

There are now thousands of possibilities for these products on Amazon, but choosing the best one can be difficult and time-consuming. And what engine oil fluid additives should you purchase in 2022?

This guide is the result of more than 10 years of experience in researching, testing and writing about many topics. Each member of our team is an authority in their area. We read every article we could find online and every consumer review on every retail website for seven hours. Additionally, we discovered a ton of websites that offered helpful resources, including buying tips and thorough information on engine oil fluid additives.