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The 8 Best engine oil treatments of 2025

Are you trying to find engine oil treatments 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 treatments 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 14 hours of research and did 26 engine oil treatments 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 treatments you can buy today

No. 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
STP High Mileage Oil Treatment + Stop Leak - 15 FL OZ
  • One 15 fl oz bottle of STP High Mileage Oil Treatment + Stop Leak
  • ZDDP oil additive prevents wear to protect your high-mileage vehicle
  • High-viscosity formula creates a thick cushion between moving engine parts to reduce friction
  • Leak stopper helps prevent engine leaks, noises and smoking and helps to rejuvenate seals and gaskets
  • Add this oil treatment to engine oil during every oil change
  • Formulated for vehicles with more than 75,000 miles
No. 3
Rislone 4102 XTREME LUBE® Maximum Performance Engine Treatment
  • REDUCES FRICTION AND WEAR: Multi-grade formula allows the oil to flow freely and provides protection over a broader temperature range
  • REMOVES AND PREVENTS SLUDGE: XTREME LUBE Maximum Performance removes sludge and other harmful deposits within engines that can alter tolerances, stick rings, cause noisy valves & lifters, and plug oil passages and screens
  • QUIETS NOISY LIFTERS: The unique Rislone formula is designed to penetrate into bearing surfaces, piston rings and ring grooves, where sludge and varnish is likely to form. These deposits are gradually removed and held in suspension until they are trapped in the filter or removed with the next oil change
  • QUIETS NOISY VALVES: Regular use of Rislone Engine Treatment, with oil and filter changes at the proper intervals, will keep such deposits to a minimum
  • MADE IN THE USA: Will not void manufacturer's new vehicle
No. 4
Liqui Moly MoS2 Anti-Friction Engine Treatment | 300 ml | Oil additive | SKU: 2009
  • 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
No. 5
STP Ceramic Oil Treatment, Protective Coating and Anti-Friction Technology, 15 Oz (19387)
  • Ceramic coating remains after oil changes to protect your engine for up to 15,000 miles
  • Anti-friction technology improves lubrication between metal parts for a smoother, quieter engine
  • Protective coating prevents engine deposits and help clean sludge build-up
  • Helps improve gas mileage, increase horsepower and reduce emissions
  • This STP oil treatment is engineered for use in conventional or synthetic motor oils and is safe for all gas or diesel engines
  • STP—One of the most trusted names in car care for more miles than anyone can count
No. 6
Bar's Leaks OS-1 Seal Engine Oil Burning/Leak Repair - 16.9 oz.
  • REPAIRS LEAKING MAIN SEALS AND GASKETS: We have designed this product to work in all gasoline and diesel engines including turbocharged, EcoBoost, hybrid and even racing engines.
  • RENEWS WORN VALVE SEALS AND GUIDES: Your vehicle is a good candidate for Bar’s Leaks Oil Seal Engine Oil Burning & Leak Repair if it does not consume more than one quart of oil per day.
  • STOPS OIL BURNING & BLUE EXHAUST SMOKE: This covers 3, 4, 5, 6, 8 and 10 cylinder engines in all cars, trucks, vans and SUV’s. Our product can also be used in heavy-duty applications referencing the appropriate dosage level.
  • SEAL ALL OTHER OIL LEAKS, DRIPS AND CONSUMPTION: This applies to a wide range of other motor applications too - tractors, boats, RV’s, motorcycles (including wet clutch), ATV’s, lawn equipment.
  • MADE IN THE USA
No. 7
BestLine Racing Nano-Lubricant Engine Oil Additive For Gas & Diesel Engines.- Reduce Friction by 60% - Nanotechnology for Optimum Performance, Engine Protection, and Enhanced Oil Change Intervals
  • Reduces friction by approximately 60% compared to conventional engines, by forming an ultra-low friction film on top of the Diamond Nano-coating. Oil additive for car engine, and oil treatment for car and truck engines.
  • Use for any type of vehicle, gasoline and diesel engines. Use in motorcycles, cars, classic cars, race cars, commercial trucks, and everything in between.
  • More Concentrated High-Pressure Diamond Nano Engine Treatment Formula. Helps to reduce oil changes and engine noise. Returns power and life to high mileage vehicles. Superior Heat Resistance maintains lubrication integrity up to 1,800°F (982°C), outperforming conventional PTFE-based additives. Universal Compatibility is effective in gasoline, diesel, hybrid, and racing engines across all platforms.
  • Use one bottle for every 5 quarts of oil; it is best if used at every oil change. Dual-Action Formula combines cleaning detergents with protective additives to: Remove existing sludge, Prevent new deposit formation, and neutralizes acidic oil breakdown. Restore your engine easily with BestLine Racing Diamond Nano Lube, a metal surface treatment.
  • Extreme Heat Resistance and Boundary Layer Protection and Surface Polishing & Friction Reduction The nanoparticles (5-10nm size) act like microscopic ball bearings between moving parts. That fills microscopic grooves in cylinder walls and bearing surfaces, polishes metal surfaces to mirror-like smoothness through mechanical action, and reduces friction by up to 60% compared to conventional oils.
No. 8
Prolong Super Lubricants PSL11000 Engine Treatment - 12 oz. , White
  • Includes a Formula with Anti-Friction Metal Treatment Technology
  • Features Engineering Designed to Treat Metal Surfaces of Both Gasoline and Diesel Fueled Engines
  • Offers Molecules that Interact with Metal Surfaces and Chemically Bond to Create a Protective Layer that Reduces Damaging Friction and Heat
  • Offers to Protect the Engine Even when the Motor Oil is Not Yet Fully Circulating
  • Features a Formula Containing No Solid Particles Such as PTFE Resins, 'Molys', Zinc, Copper, or Graphite
No. 9
Lucas Oil 10016 Complete Engine Treatment - 16 Ounce
  • AFFORDABLE SOLUTIONS
  • Reduces friction and wear
  • Removes harmful deposits on intake valves and cylinder heads
  • Cleans and lubricates the entire fuel system from the tank to injectors
No. 10
BG Advanced Formula MOA 115
  • Extends engine life
  • Reduces wear
  • Prevents sludge and varnish
  • Prevents excessive oil consumption
  • Keeps piston rings from sticking
SaleNo. 11
Lucas Oil 10003 Fuel Treatment - 1 Quart
  • The world’s #1 fuel additive for both gasoline and diesel engines
  • A great tune-up in a bottle – treats gasoline, diesel fuel and increases MPG
  • Cleans and lubricates the fuel system, including fuel injectors, carburetor and combustion chamber
  • Improves fuel economy by burning excess exhaust emissions
  • Increases power and acceleration by improving fuel flow and reducing deposit buildup
  • Neutralizes sulfur and other harmful contaminants present in the fuel system
  • Increases the life of pumps and injectors
  • Prevents rust and corrosion, prolonging the life of engine and fuel system components
  • Complies with federal low sulfur content requirements for diesel motor vehicles and non-road, locomotive and marine diesel equipment engines
  • Safely replaces the need for lead in older engines without causing harmful effects
No. 12
zMAX 58-011 - Engine & Fuel Formula Kit - Easy to Use - Reduces Carbon Build-Up & Lubricates Metal Extending Life of Car or Truck - Runs Efficiently, Improving Gas or Diesel Mileage - 12 oz - 2 Pack
  • Extend the Life Of Your Vehicle: zMAX Engine & Fuel formulas are easy to use. Micro-lubrication soaks into metal surfaces, which improves lubricity and reduces carbon deposit build-up while boosting performance and protecting vital vehicle parts.
  • Engine Efficiency: Add zMAX Engine Formula to gain efficient combustion resulting in more power. Use at your routine oil change or every 6k miles for reduced engine wear, lower emissions and keep your engine running smoothly.
  • Fuel Conditioner: Pour zMAX Fuel Formula in the fuel tank to lubricate and maintain a clean fuel injector system. It conditions the pumps and nozzles reducing carbon residue from the valves and pistons while improving fuel efficiency and performance.
  • Trusted by Professionals & Dealerships: Stock zMAX in your garage to care for your car like a professional. From local repair shop mechanics to major car dealership groups, our formula is mechanic trusted. zMAX is USA-Made.
  • Reputable Craftsmanship and Performance: zMAX is proud to be the Official Micro-lubricant of Speedway Motorsports. Trusted for over 80 years, zMAX helps cut costs at the pump and extends your engine’s life.
No. 13
Bar's Leaks High Mileage Engine Repair-It, 16.9 oz
  • RESTORES PERFORMANCE: Contains a combination of the best performance additives to repair the most common oil-related problems
  • INCREASES COMPRESSION AND HORSEPOWER: Restores lost compression and power, reduces noise and oil consumption, while improving the performance of worn cylinders, rings, bearings, and seals
  • STOPS LEAKS, NOISE, AND SMOKING: For most vehicles, this is your last chance before paying an expensive repair bill or replacing the vehicle
  • FRICTION MODIFIERS: Engine Repair can be used to top off the existing oil when low, or add a bottle when changing the oil and filter
  • REPAIR-IT: Engine Repair-It can be used to top off existing oil when low or add a bottle when changing oil.
SaleNo. 14
Lucas Oil 10130 Pure Synthetic Oil Stabilizer - 1 Quart
  • Increase oil life by at least 50%
  • Reduces oil consumption
  • Eliminates dry starts
  • Raises oil pressure
SaleNo. 15
Slick 50 750002 Recharged High Mileage Engine Treatment, 15-Ounce
  • High Mileage solution to protect against power robbing friction heat and wear
  • Restores performance in engines due to wear and oil consumption in older engines
  • Revitalizes seals to help stop oil leaks and prevent them from ever occuring
  • Powerful detergents to remove and prevent oil sludge, use during your next oil change or between changes to replace lost additive content
  • Powerful detergents to remove and prevent oil sludge, use during your next oil change or between changes to replace lost additive content
  • This product is dispensed in 10W-30 which is a multi-grade oil but is fully compatible with all multi grade motor oils and mono grade oils. It is fully compatible with all conventional, semi-synthetic and full synthetic oil types.
SaleNo. 16
Lucas Oil 10118 High Mileage Oil Stabilizer - 1 Quart
  • Excellent at fighting off sludge
  • Lubricates all internal parts to minimize wear in any engine
  • Raises oil pressure
  • Eliminates the noise, emissions and oil consumption associated with worn engine
SaleNo. 17
Restore (00016 8-Cylinder Formula Engine Restorer & Lubricant - 16 oz.
  • Restores cylinder compression
  • Restores horsepower
  • Restores engine performance
  • Reduces oil consumption
No. 18
Daley Mint Towel with Lucas Fuel Treatment Upper Cylinder, 32oz + Heavy Duty Oil Stabilizer, 32oz | Prolong Engine Life, Maintenance for Gasoline & Diesel Cars, Trucks, RV
  • 1 LUCAS UPPER CYLINDER LUBRICANT (32OZ)- Neutralizes poor quality fuel. Upper Cylinder Lubricant turns emissions into power and raises fuel mileage
  • 1 LUCAS HEAVY DUTY FUEL TREATMENT (32OZ) - Formulated for both gasoline and diesel engines, carbureted or fuel injected. Also, it cleans and lubricates the carburetor and injectors and causes the fuel to burn more thoroughly for increased power and less fuel consumption.
  • 1 DALEY MINT TOWEL - Receive 1, soft cotton towel; Super absorbent cotton to clean and wipe spills around the engine; Machine wash to use over & over again
  • COMBO PACK - It allows motor oils a higher degree of lubricity which reduces oil consumption and operating temperatures; Neutralizes the harmful effects of low sulfur diesel fuel
No. 19
Slick 50 Original Classic Engine Treatment with Cerflon, Ceramic Protection Against Friction and Heat, 32 fl. oz, 1 Pack
  • CERFLON PTFE TECHNOLOGY. Provides advanced ceramic and PTFE protection, reducing friction and wear in critical engine components.
  • ENHANCED ENGINE PERFORMANCE. Helps maintain engine power and efficiency by minimizing internal friction and heat buildup.
  • LONG-LASTING PROTECTION. Coats engine surfaces with a durable ceramic and PTFE barrier, offering extended protection during high-stress conditions.
  • IMPROVES FUEL EFFICIENCY. Reduces engine drag, leading to smoother operation and potentially improved fuel economy.
  • COMPATIBLE with ALL OILS. Works seamlessly with conventional, semi-synthetic, and full synthetic motor oils for versatile use in any engine.
No. 20
TriboTEX Nano Oil Additive Car Engine Treatment: Add to Engine Lube - Makes High Mileage Cars Like New with a Synthetic Material (Treats One Regular Truck, Tractor or Small Diesel)
  • GROUNDBREAKING: Made in the USA – TriboTEX is a revolutionary engine oil additive. It contains synthetic nanoparticles developed with funding from the U.S. Department of Energy, NASA, & the National Science Foundation.
  • QUIETER & SMOOTHER PERFORMANCE: Reverses wear in bearings by building a diamond-like carbon coating.
  • UNIVERSAL: Compatible with all types of motor oil and can be used in gas or diesel engines. Use for both old and new cars. It is an excellent engine booster.
  • EFFICIENT: Our masterfully engineered engine treatment improves fuel consumption and reduces engine noise. It is time to improve your engine and take your driving experience to a new level.
  • GUARANTEED QUALITY: We know you will be delighted with this ground-breaking technology. Our treatment comes with a 100% satisfaction guarantee.

How to choose a good engine oil treatments

Does the idea of finding a fantastic engine oil treatments 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 treatments. 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 treatments 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 treatments 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 treatments 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 treatments 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 treatments 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 treatments, 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 treatments.

Durability: Durability and reliability are closely related concepts. You will benefit from a strong and long-lasting engine oil treatments 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 treatments. 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 treatments 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 treatments.