Best Engine Oil Additive for 2023: Our Top 15 Picks

Sometimes it might be quite difficult to find the best engine oil additive. With every niche market offering so many different products, it makes sense that this is the case.

Unfortunately, this very fact can make it incredibly difficult to find the item that best suits your needs, which is why we’ve put together this engine oil additive buying guide.

Our Top 15 Recommendations:

#	Preview	Product
1		Prolong Super Lubricants PSL11000 Engine Treatment - 12 oz. , White	Check Price
2		Liqui Moly (20002) Cera Tec Friction Modifier - 300 ml	Check Price
3		Bar's Leaks High Mileage Engine Repair, 16.9 oz	Check Price
4		Rislone High Mileage Engine Treatment, 16.9 oz	Check Price
5		BG Advanced Formula MOA 115	Check Price
6		Bar's Leaks Oil Seal Engine Oil Burning and Leak Repair	Check Price
7		REV X ZDDP Oil Additive - Zinc & Phosphorus	Check Price
8		Lucas Oil 10001 Heavy Duty Oil Stabilizer - 1 Quart	Check Price
9		High Mileage Oil Treatment, Stop Leak Formula for Cars and Trucks, 15 Oz, STP	Check Price
10		Liqui Moly 2037 Pro-Line Engine Flush	Check Price
11		Rislone 4405 Engine Oil Supplement Concentrate with Zinc Treatment - 11 oz, Yellow	Check Price
12		Hot Shot's Secret Original Stiction Eliminator – 32 Oz - Oil Additive – Engine...	Check Price
13		BestLine Racing Diamond Nano-Lube Engine Oil Treatment (12 ounce)	Check Price
14		Synthetic Engine Oil Treatment Additive Universally Compatible Performance Enhancing Reverses Engine...	Check Price
15		Slick 50 Original Classic Engine Treatment with Ceramic Cerflon PTFE, SL-750017, 32 fl. oz, 1 Pack,...	Check Price

Best Engine Oil Additive Reviews:

Bestseller No. 1

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

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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

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Bestseller No. 3

Bar's Leaks High Mileage Engine Repair, 16.9 oz

• Increases Oil Pressure
• Reduces Friction
• Helps Clean Internal Parts
• Quiets Noise

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Bestseller No. 4

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

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Bestseller No. 5

BG Advanced Formula MOA 115

• Extends engine life
• Reduces wear
• Prevents sludge and varnish
• Prevents excessive oil consumption
• Keeps piston rings from sticking

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Bestseller No. 6

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

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SaleBestseller No. 7

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).

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SaleBestseller No. 8

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

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Bestseller No. 9

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

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Bestseller No. 10

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

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SaleBestseller 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

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SaleBestseller No. 12

Hot Shot's Secret Original Stiction Eliminator – 32 Oz - Oil Additive – Engine Restorative – with FR3 Nano Carbon Lubricant – Reduces Wear – Improves Power – Restores Oil Pressure

• Improves Power – Restores lost engine power and compression by removing sludge and varnish deposits from engine components, and neutralizing harmful acids that cause corrosion
• Reduces Wear – Decreases friction and reduces engine wear by up to 62%, to keep your engine healthy and at peak performance
• Protects Components – Contains a carbon nano lubricant that cleans and protects engine components including turbo injectors, rings, oil pump, pistons, HEUI injectors, and more
• For Any Engine – Perfect for any gasoline or diesel engine to improve fuel economy and help you save at the pump with improved and restored engine performance
• Relieves Stiction Symptoms – Cures and prevents symptoms of stiction and low quality engine oil including failing HEUI injectors, black smoke, hard starts, and weak turbo boost

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SaleBestseller No. 13

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

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Bestseller No. 14

Synthetic Engine Oil Treatment Additive Universally Compatible Performance Enhancing Reverses Engine Wear and Increases Vehicle Life and Mileage 8 Fl Oz by SHINE ARMOR

• Optimal Engine Performance. Our performance booster engine treatment reverses wear in bearings by building a carbon coating, providing effective gas treatment for quiet, smooth and efficient performance. A cutting-edge, nanoparticle-based solution that works great for gas and diesel engines alike. It takes the properties of your host oil to the next level while preventing rust, oxidation & reduce friction.
• Groundbreaking Formula Gear Oil. This revolutionary engine oil additive is eco friendly, made in the USA and contains scientifically backed synthetic oil nanoparticles to boost engine performance.
• Universally Compatible. Our Engine Performance Booster oil treatment can be used in both gas and diesel engines, and old and new cars. Shine Armor's Oil Additive is compatible with all types of motor oil & engine oil like 5w30, 0w-20, 10w30, 5w20, 15w40 & more.
• Quality Assured. We know you will be delighted with this ground-breaking engine additive technology. Our oil additive treatment is formulated using the latest technology and backwards-compatible with all vehicles.
• Quick & Easy to Use. Effective in small two-cycle engines just add Performance Booster to the oil before mixing it with fuel. Use it to treat any oil lubricated system except air conditioning & aircraft. Use Performance Booster Oil Additive after getting a fresh oil change, or use it on the oil that you have now.

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SaleBestseller No. 15

Slick 50 Original Classic Engine Treatment with Ceramic Cerflon PTFE, SL-750017, 32 fl. oz, 1 Pack, White

• Protects against power robbing friction and heat
• Enhances oil durability
• Cleans and prevents sludge
• Use every oil change for maximum effectiveness
• Lubricity of PTFE but with Ceramic Technology which means the best wear protection and the best thermal stability - Better than PTFE alone

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Last update on 2023-01-12 / Affiliate links / Images from Amazon Product Advertising API

How to find the best engine oil additive?

Here, we’ll be going over a number of factors that you can use to ensure that you’re purchasing the best engine oil additive for you.

Regardless of which type of item you’re looking to buy, chances are that there are existing buying guides on the internet, all of which aim to give you good engine oil additive recommendations.

Despite these recommendations, however, it’s always a good idea to do your own research. In addition to this research, asking yourself the following questions is also super helpful:

• What features does the engine oil additive need to have to be perfect for my needs?
• What is my budget?
• Do I need to purchase a certain brand?

Once you’ve answered these questions and have a good idea of what you’re looking for and the buying process becomes much easier. Keep in mind that when looking for the best product, there’s no need to rush. In fact, very rarely are the ideal products found by choosing the first one you see or by basing your decisions on only one factor. Take your time and enjoy the process!

Now, with the answers to the previous questions in mind, we urge you to use our upcoming buying guide for engine oil additive to find what you’re looking for:

Brand

In some cases, the brand of engine oil additive is very important. For example, if you’re looking for an item that works in tandem with another, you might very well need both products to be the same brand. If this is the case, it’s vital to pay attention to this factor, as choosing the wrong product can mean the difference between wasting your money and buying a great product that functions as it should.

Features

The features in any given engine oil additive are important because they can dictate which version of an item you need and how much money you need to spend. Consider all the key features that you want your item to have and don’t settle for anything that doesn’t check at least ¾ of your boxes.

Reviews

Customer reviews about engine oil additive are crucial – especially when you’re buying a product that costs a lot of money or serves a big importance. Luckily, most products can be found online, which means that it’s common for there to be scores of customer reviews from those who have already purchased any given product.

Pay attention to these reviews. Take note of the pros and cons that they mention, and factor these into your big decision. In some cases, you’ll be forced to sacrifice one con in order to gain a particular pro, but being aware of the potential con is going to be beneficial in either case.

Quality

Of course, quality is key. You don’t want to purchase a low-quality product. If you do, you run the risk of your item breaking, not working properly, or otherwise proving to be very disappointing, as well as a waste of money.

You can compare engine oil additive quality by researching what your potential purchases are made from, contrasting the individual items against each other to discern which one is made of the best materials.

Warranty

Warranty isn’t always going to be important, but it definitely can be. This is especially true if the item in question is tech-related or expensive. A good warranty will be valid for an extended time after purchase and cover a variety of problems ranging from item defects to random accidents, water damage, and other miscellaneous events that could ruin your product.

Conclusion

The quest to find the best engine oil additive can be daunting – but it doesn’t have to be. It can be made much easier by asking yourself a few simple questions and then thinking critically about the items you want to buy. Consider their features, quality, brand, warranty, and customer reviews and you’re more likely to make a great purchase.