20 Best Engine Oil Additives [2024]

Are you looking for the best engine oil additives? Based on expert reviews, we ranked them. We've listed our top-ranked picks, including the top-selling engine oil additives.

We Recommended:

# Preview Product
1 Bar's Leaks Oil Seal Engine Oil Burning and Leak Repair Bar's Leaks Oil Seal Engine Oil Burning and Leak Repair
2 Liqui Moly (20002) Cera Tec Friction Modifier - 300 ml Liqui Moly (20002) Cera Tec Friction Modifier - 300 ml
3 REV X ZDDP Oil Additive - Zinc & Phosphorus (5 Pack) REV X ZDDP Oil Additive - Zinc & Phosphorus (5 Pack)
4 Bar's Leaks High Mileage Engine Repair, 16.9 oz Bar's Leaks High Mileage Engine Repair, 16.9 oz
5 BestLine Racing Diamond Nano-Lube Engine Oil Treatment (12 ounce) BestLine Racing Diamond Nano-Lube Engine Oil Treatment (12 ounce)
6 Restore (00012) 6-Cylinder Formula Engine Restorer & Lubricant - 12.5 oz. Restore (00012) 6-Cylinder Formula Engine Restorer & Lubricant - 12.5 oz.
7 Lucas Oil 10001 Heavy Duty Oil Stabilizer - 1 Quart Lucas Oil 10001 Heavy Duty Oil Stabilizer - 1 Quart
8 zMAX 51-011 - Engine & Fuel Formula Kit - Easy to Use - Reduces Carbon Build-Up & Lubricates Metal... zMAX 51-011 - Engine & Fuel Formula Kit - Easy to Use - Reduces Carbon Build-Up & Lubricates...
9 TriboTEX Nano Oil Additive Car Engine Treatment: Add to Engine Lube - Makes High Mileage Cars Like... TriboTEX Nano Oil Additive Car Engine Treatment: Add to Engine Lube - Makes High Mileage Cars...
10 XADO 1 Stage Maximum for Diesel Trucks | Engine Oil Additive for Heavy Duty Machinery & Tractor... XADO 1 Stage Maximum for Diesel Trucks | Engine Oil Additive for Heavy Duty Machinery & Tractor...
11 REV X High Performance Oil Additive - 4 fl. oz. (4 Pack) REV X High Performance Oil Additive - 4 fl. oz. (4 Pack)
12 Rislone High Mileage Engine Treatment, 16.9 oz Rislone High Mileage Engine Treatment, 16.9 oz
13 High Mileage Oil Treatment, Stop Leak Formula for Cars and Trucks, 15 Oz, STP High Mileage Oil Treatment, Stop Leak Formula for Cars and Trucks, 15 Oz, STP
14 Liqui Moly 2037 Pro-Line Engine Flush Liqui Moly 2037 Pro-Line Engine Flush
15 Restore (00009 4-Cylinder Formula Engine Restorer & Lubricant - 9 oz. Restore (00009 4-Cylinder Formula Engine Restorer & Lubricant - 9 oz.
16 Rislone 4405 Engine Oil Supplement Concentrate with Zinc Treatment - 11 oz, Yellow Rislone 4405 Engine Oil Supplement Concentrate with Zinc Treatment - 11 oz, Yellow
17 XADO Engine Oil Additive - Protection For Engines - Additive For Wear Protection & Rebuilding Of... XADO Engine Oil Additive - Protection For Engines - Additive For Wear Protection & Rebuilding Of...
18 Liqui Moly 20004 Hydraulic Lifter Additive Liqui Moly 20004 Hydraulic Lifter Additive
19 BG MOA Motor Oil Additive 11oz (12 Pack) BG MOA Motor Oil Additive 11oz (12 Pack)
20 REV X ZDDP Oil Additive - Zinc & Phosphorus REV X ZDDP Oil Additive - Zinc & Phosphorus
Bestseller No. 1
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...
  • 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...
  • 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...
SaleBestseller No. 2
Liqui Moly (20002) Cera Tec Friction Modifier - 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
Bestseller No. 3
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).
Bestseller No. 4
Bar's Leaks High Mileage Engine Repair, 16.9 oz
  • Increases Oil Pressure
  • Reduces Friction
  • Helps Clean Internal Parts
  • Quiets Noise
Bestseller No. 5
BestLine Racing Diamond Nano-Lube Engine Oil Treatment (12 ounce)
  • Reduces friction by approximately 60% compared to conventional engines, by forming an ultra-low friction film on top of the Diamond Nano-coating.
  • Use for any type of vehicle from go carts to commercial trucks and everything in between.
  • More Concentrated High-Pressure Formula
  • Use One Bottle for Every 5 quarts of oil
  • Extreme Heat Resistance and Boundary Layer Protection
SaleBestseller No. 6
Restore (00012) 6-Cylinder Formula Engine Restorer & Lubricant - 12.5 oz.
  • Restores cylinder compression
  • Restores horsepower
  • Restores engine performance
  • Reduces oil consumption
Bestseller No. 7
Lucas Oil 10001 Heavy Duty Oil Stabilizer - 1 Quart
  • Extends oil and engine life
  • Virtually eliminates dry starts and excessive wear
  • Raises Oil Pressure
  • Will not sludge or varnish
  • Lowers engine temperature
SaleBestseller No. 8
zMAX 51-011 - Engine & Fuel Formula Kit - Easy to Use - Reduces Carbon Build-Up & Lubricates Metal...
  • EXTEND THE LIFE OF YOUR VEHICLE: zMAX Engine & Fuel formulas are simple and easy to use. Micro-lubrication soaks into metal surfaces, which improves...
  • ENGINE EFFICIENCY: Add zMAX Engine Formula to gain efficient combustion resulting in more power. Use the engine treatment at your routine oil change...
  • FUEL CONDITIONER: Pour zMAX Fuel Formula in the fuel tank to lubricate and maintain a clean fuel injector system. It improves fuel efficiency and...
  • TRUSTED BY PROFESSIONALS & DEALERSHIPS: Stock zMAX in your garage to treat your car like a professional. From local repair shop mechanics to major car...
  • REPUTABLE QUALITY AND PERFORMANCE: zMAX is proud to be the Official Micro-lubricant of Speedway Motorsports. Proven and trusted for over 80 years,...
Bestseller No. 9
TriboTEX Nano Oil Additive Car Engine Treatment: Add to Engine Lube - Makes High Mileage Cars Like...
  • GROUNDBREAKING: Made in the USA – TriboTEX is a revolutionary engine oil additive. It contains synthetic nanoparticles developed with funding from...
  • 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...
  • EFFICIENT: Our masterfully engineered engine treatment improves fuel consumption and reduces engine noise. It is time to improve your engine and take...
  • GUARANTEED QUALITY: We know you will be delighted with this ground-breaking technology. Our treatment comes with a 100% satisfaction guarantee.
Bestseller No. 10
XADO 1 Stage Maximum for Diesel Trucks | Engine Oil Additive for Heavy Duty Machinery & Tractor...
  • Engine Oil Additive for Diesel Trucks | Restore worn parts’ surfaces and compensate current wear. Increase engine power and acceleration capability
  • Suitable for Diesel engines with oil capacity system up to 30-45 qt | Level and increase compression in cylinders. Create active protection system...
  • Reduce fuel consumption. Enhance engine service life
  • Increase pressure in oil system up to the nominal level. Reduce noise and vibration
  • GREAT PRODUCT FOR DIESEL ENGINES OF HEAVY-DUTY VEHICLES
Bestseller No. 11
REV X High Performance Oil Additive - 4 fl. oz. (4 Pack)
  • Highly Concentrated: 4 fl. oz. will treat up to 6 quarts of most lubricants & oils.
  • Extreme Reduction in Friction: Reduces friction & increases efficiency of vital drivetrain parts, freeing them to create more consistent power.
  • Complete Oil System Cleaner:Cleans the entire oil system using an organic detergent package with no dangerous chemical strippers.
  • Reduces Engine Noise: By reducing the friction & metal to metal contact in your engine it will run noticeably quieter.
  • Extended Service Life: Extends the service life of lubricants making them last longer & extending the interval between oil changes.
Bestseller No. 12
Rislone High Mileage Engine Treatment, 16.9 oz
  • Reduces friction and wear
  • Quiets noisy lifters and valves
  • Removes and prevents sludge
  • Add to engine oil anytime
  • Will not void manufacturer's new vehicle
Bestseller No. 13
High Mileage Oil Treatment, Stop Leak Formula for Cars and Trucks, 15 Oz, STP
  • 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
Bestseller No. 14
Liqui Moly 2037 Pro-Line Engine Flush
  • 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
Bestseller No. 15
Restore (00009 4-Cylinder Formula Engine Restorer & Lubricant - 9 oz.
  • Restores cylinder compression
  • Restores horsepower
  • Restores engine performance
  • Reduces oil consumption
SaleBestseller No. 16
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
Bestseller No. 17
XADO Engine Oil Additive - Protection For Engines - Additive For Wear Protection & Rebuilding Of...
  • 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
Bestseller No. 18
Liqui Moly 20004 Hydraulic Lifter Additive
  • Improves the lubrication properties of the oil
  • Cleans valve bores
  • Suitable for use in vehicles with turbochargers and vehicles with catalytic converters
  • Prevents engine noises caused by hydraulic tappets
  • Flash point: 60.0 degrees_celsius
Bestseller No. 19
BG MOA Motor Oil Additive 11oz (12 Pack)
  • Fortifies all qualities of engine oil
  • Providing superior, long-lasting engine protection
  • Maintains peak engine performance
  • Prevents engine oil oxidation and thickening
SaleBestseller No. 20
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).

Having trouble finding a great engine oil additives?

This problem is well understood by us because we have gone through the entire engine oil additives research process ourselves, which is why we have put together a comprehensive list of the best engine oil additivess available in the market today.

After hours of searching and using all the models on the market, we have found the best engine oil additives for 2023. See our ranking below!

How Do You Buy The Best Engine Oil Additives?

Do you get stressed out thinking about shopping for a great engine oil additives? Do doubts keep creeping into your mind?

We understand, because we’ve already gone through the whole process of researching engine oil additives, which is why we have assembled a comprehensive list of the greatest engine oil additives available in the current market. We’ve also come up with a list of questions that you probably have yourself.

John Harvards has done the best we can with our thoughts and recommendations, but it’s still crucial that you do thorough research on your own for engine oil additives that you consider buying. Your questions might include the following:

  • Is it worth buying an engine oil additives?
  • What benefits are there with buying an engine oil additives?
  • What factors deserve consideration when shopping for an effective engine oil additives?
  • Why is it crucial to invest in any engine oil additives, much less the best one?
  • Which engine oil additives are good in the current market?
  • Where can you find information like this about engine oil additives?

We’re convinced that you likely have far more questions than just these regarding engine oil additives, and the only real way to satisfy your need for knowledge is to get information from as many reputable online sources as you possibly can.

Potential sources can include buying guides for engine oil additives, rating websites, word-of-mouth testimonials, online forums, and product reviews. Thorough and mindful research is crucial to making sure you get your hands on the best-possible engine oil additives. Make sure that you are only using trustworthy and credible websites and sources.

John Harvards provides an engine oil additives buying guide, and the information is totally objective and authentic. We employ both AI and big data in proofreading the collected information.

How did we create this buying guide? We did it using a custom-created selection of algorithms that lets us manifest a top-10 list of the best available engine oil additives currently available on the market.

This technology we use to assemble our list depends on a variety of factors, including but not limited to the following:

  1. Brand Value: Every brand of engine oil additives has a value all its own. Most brands offer some sort of unique selling proposition that’s supposed to bring something different to the table than their competitors.
  2. Features: What bells and whistles matter for an engine oil additives?
  3. Specifications: How powerful they are can be measured.
  4. Product Value: This simply is how much bang for the buck you get from your engine oil additives.
  5. Customer Ratings: Number ratings grade engine oil additives objectively.
  6. Customer Reviews: Closely related to ratings, these paragraphs give you first-hand and detailed information from real-world users about their engine oil additives.
  7. Product Quality: You don’t always get what you pay for with an engine oil additives, sometimes less, and sometimes more.
  8. Product Reliability: How sturdy and durable an engine oil additives is should be an indication of how long it will work out for you.

John Harvards always remembers that maintaining engine oil additives information to stay current is a top priority, which is why we are constantly updating our websites. Learn more about us using online sources.

If you think that anything we present here regarding engine oil additives is irrelevant, incorrect, misleading, or erroneous, then please let us know promptly!

FAQ:

Q: Do you recommend the use of engine oil additives?

A: There are two primary functions of oil additives: to prevent corrosion (rust) from destroying your engine, and to keep everything operating efficiently. Oil additives blend into your motor oil, better lubricating every part that it touches, reducing friction and provides protection for metallic surfaces within your vehicle.

Q: Which engine oil is good?

A: Benefits of Diesel Oil. Extend engine life. … Types of Diesel Oil. This type of artificially manufactured diesel oil consists of a set of synthesized base oils mixed with additives. Top Brands. … Diesel Oil Pricing. … Key Features. … Other Considerations. … Best Diesel Oil Reviews&Recommendations 2023. … Tips. … FAQs

Q: What is the best high mileage oil additive?

A: Best Oil Additive For Older Engines. Oil additives have been used for many years now and are most effective when used with high mileage or older engines. Liqui Moly Cera Tec Friction Modifier. … Sea Foam SF-16 Motor Treatment. … Archoil AR9100 Oil Additive. … Lucas Heavy Duty Oil Stabilizer. … Best Line Oil Additive Engine Treatment. … Oil Additive Buying Guide. …

Q: What is the best engine oil in the world?

A: Adds an average of 550 miles per year in fuel economy Cleans pistons better than the industry standard Carbon-neutral product Maximizes high-performance engines

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