Product Reviews

8 Best Car Engine Oil Additives in 2025

As an Amazon Associate we earn from qualifying purchases.

As an Amazon Associate I earn from qualifying purchases.
Choosing the right engine oil additive can make a world of difference in your vehicle’s performance and longevity. These specialized products help protect your engine by minimizing wear, reducing friction, and improving efficiency. With options ranging from friction reducers to oil seal repair solutions, it’s essential to find the right fit for your engine’s needs.

In this article, we’re diving into eight of the best car engine oil additives available in 2025. We’ll explore their unique features, benefits, and any potential drawbacks, so you can confidently select the product that aligns with your vehicle’s requirements.

Things To Keep In Mind Before You Buy

  • Compatibility: Always check if the additive is compatible with your vehicle’s engine type and oil. Some additives are designed for specific engine types, so ensure it matches your gas or diesel engine.
  • Intended Use: Consider what you want the additive to achieve. Whether it’s reducing noise, improving fuel economy, or sealing leaks, understanding your needs will guide your selection.
  • Formulation: Look at the formulation of the additive. Some products utilize advanced technology, such as nanoparticles or synthetic materials, which can significantly enhance performance compared to traditional additives.
  • Ease of Use: Some additives require precise measurements or specific conditions for application, while others are straightforward. Choose one that fits easily into your maintenance routine.
  • Long-Term Benefits: Investigate the long-term benefits of the additive. While some may offer immediate improvements, others might provide lasting effects on engine health and efficiency, which is crucial for long-term vehicle care.

1. Prolube Oil Treatment – Engine Oil Additive for Gas & Diesel Engines

Prolube Oil Treatment is designed to maximize engine performance while reducing wear and noise. This versatile oil additive works with both gas and diesel engines, making it suitable for a wide range of vehicles. Its advanced formula not only enhances horsepower but also optimizes fuel efficiency, allowing you to save on fuel costs significantly. With a recommended dosage of 1 oz per quart for standard engines and 2 oz for heavy-duty applications, this product is user-friendly and effective.

Users have reported noticeable improvements in engine performance, with reduced vibrations and smoother operation. Prolube’s ability to extend oil life while providing essential protection during startup is particularly beneficial for those who want to maintain their engine’s health without frequent oil changes. The additive also seamlessly blends with both synthetic and petroleum oils, making it an excellent choice for diverse engine types.

This product is perfect for vehicle owners looking to improve engine performance and longevity without breaking the bank. Whether you drive a car, truck, or use industrial machinery, Prolube Oil Treatment offers versatility and effectiveness that can enhance your driving experience.

Pros Cons
  • Enhances horsepower and reduces noise
  • Compatible with gas and diesel engines
  • Improves fuel efficiency by up to 45%
  • Extends oil life and protects against wear
  • Easy to use with clear dosage instructions
  • Effectiveness may vary based on engine condition
  • Some users report mixed results with older engines

2. BestLine Racing Nano-Lubricant Engine Oil Additive For Gas & Diesel Engines

BestLine Racing Nano-Lubricant is a game-changer in the world of engine oil additives. Utilizing advanced nanotechnology, this product reduces friction by approximately 60%. Its ultra-low friction film enhances performance across various engine types, including gasoline, diesel, and even racing engines. Notably, it boasts superior heat resistance, maintaining lubrication integrity even at extreme temperatures of 1,800°F (982°C).

Users appreciate the dual-action formula that not only cleans but also protects. This additive effectively removes sludge while preventing new deposit formation, ensuring your engine runs smoothly. Many users have reported that their high-mileage vehicles experience a noticeable return in power, making this a popular choice among car enthusiasts and everyday drivers alike.

BestLine Racing Nano-Lubricant is ideal for anyone seeking to optimize their engine’s efficiency and longevity. Its broad compatibility makes it suitable for a diverse range of vehicles, while the advanced formulation caters to those who demand top-tier performance.

Pros Cons
  • Reduces friction significantly
  • Wide compatibility across various engines
  • Helps increase oil change intervals
  • Effective in high-temperature environments
  • Restores power to high-mileage vehicles
  • Higher price point compared to basic additives
  • May require frequent application for optimal results

3. Lucas Oil Products LUC10278 Engine Oil Stop Leak, 1 Quart

Lucas Oil Engine Oil Stop Leak is a reliable solution for those dealing with oil leaks in their engines. This additive is specifically formulated to rejuvenate worn seals, helping to prevent leaks and reduce oil consumption. It’s an excellent choice for both gasoline and diesel engines, including turbocharged and hybrid models.

Users have found that it not only stops leaks but also helps to restore engine performance by providing a smoother operation. The product’s thick consistency allows it to effectively coat and seal, providing lasting protection against future leaks. Many have reported improved engine performance and efficiency after using this product.

This additive is perfect for drivers who want a straightforward solution to oil leaks without the hassle of complicated applications. Its ease of use and effectiveness make it a go-to choice for maintaining engine health and preventing costly repairs down the line.

Pros Cons
  • Effectively stops oil leaks
  • Restores worn seals
  • Enhances engine performance
  • Compatible with all engine types
  • Easy to apply
  • May not be effective for all types of leaks
  • Results can vary based on engine condition

4. TriboTEX Nano Oil Additive Car Engine Treatment

TriboTEX is a revolutionary engine oil additive that utilizes synthetic nanoparticles to enhance engine performance significantly. Developed with funding from the U.S. Department of Energy and NASA, this product is perfect for both high-mileage and new vehicles. The nanoparticles create a diamond-like carbon coating that reduces friction and wear, leading to smoother operation.

Users have praised TriboTEX for its ability to quiet noisy engines and improve fuel efficiency. Its universal compatibility means it can be used with any type of motor oil, making it a versatile option for various vehicles. The product not only enhances performance but also plays a crucial role in reducing engine noise and vibrations, creating a more enjoyable driving experience.

If you’re seeking an innovative solution to boost engine performance and prolong lifespan, TriboTEX is an excellent choice. It targets drivers who want to improve their vehicle’s efficiency while benefiting from advanced technology.

Pros Cons
  • Advanced nanotechnology for superior performance
  • Reduces noise and vibrations
  • Compatible with any motor oil
  • Improves fuel consumption
  • Easy to apply
  • Higher price point may not fit every budget
  • Some users may need more than one application for optimal results

5. LIQUI MOLY Motor Oil Saver

LIQUI MOLY Motor Oil Saver is a fantastic solution for engines that consume excessive oil. This additive works by reducing oil consumption through piston rings and valve guides, effectively mitigating blue smoke from the exhaust. It also regenerates seals made of plastic and rubber, preventing leaks and promoting a cleaner engine.

Users have noted a significant decrease in oil consumption and a reduction in exhaust smoke, leading to a more environmentally friendly operation. The formula is designed to be added directly to the oil, making it easy to use without requiring any special modifications to the engine.

If you’re facing issues with oil consumption or leaks, LIQUI MOLY Motor Oil Saver is an excellent choice. It’s particularly beneficial for older vehicles that might be struggling with seal wear and oil loss.

Pros Cons
  • Reduces oil consumption effectively
  • Prevents leaks and blue smoke
  • Easy to use with any engine type
  • Improves overall engine cleanliness
  • Environmentally friendly solution
  • Results may take time to manifest
  • Not suitable for all engine conditions

6. Bar’s Leaks OS-1 Oil Seal Engine Oil Burning and Leak Repair

Bar’s Leaks OS-1 is specifically engineered to tackle oil burning and leaks in a wide range of engines. This additive works effectively in gasoline and diesel engines, including hybrids and even racing engines. It not only repairs leaking seals and gaskets but also renews worn valve seals and guides, making it an excellent all-around solution.

Users have reported impressive results in stopping oil burning and reducing blue exhaust smoke, which can save on costly repairs and enhance engine performance. The product’s easy application process ensures that even novice users can manage it without hassle.

For drivers seeking a straightforward and effective solution to oil leaks and burning issues, Bar’s Leaks OS-1 is a smart choice. Its versatility and effectiveness make it suitable for various vehicles, from everyday cars to high-performance engines.

Pros Cons
  • Effectively repairs oil leaks
  • Works in various engine types
  • Reduces oil burning and blue smoke
  • Easy to apply
  • Made in the USA
  • May not work for all leak types
  • Some users may need multiple applications

7. REV X ZDDP Oil Additive – Zinc & Phosphorus

REV X ZDDP Oil Additive is specifically formulated to create a protective anti-wear layer at friction points within the engine. This product is crucial for engines with flat tappet components and is mandatory for ensuring longevity in high-load applications. It works effectively with both synthetic and standard mineral-based oils.

Users have noted that this additive significantly reduces wear during engine break-in periods, providing essential protection for new camshafts and lifters. By mixing just two fluid ounces with six quarts of oil, it creates a robust anti-wear protection level.

For vehicle owners looking to provide their engines with the best possible protection, especially during break-in periods, REV X ZDDP Oil Additive is an indispensable choice. It’s particularly suitable for classic cars and performance vehicles that require additional care.

Pros Cons
  • Creates an effective anti-wear layer
  • Essential for flat tappet engines
  • Works with various oil types
  • Protects high-load components
  • Easy to mix and use
  • Not necessary for all engine types
  • Requires specific dosage for effectiveness

8. Lucas Oil 10063 Engine Break In Oil Additive w/ TB Zinc Plus

Lucas Oil 10063 Engine Break In Oil Additive is designed to provide extreme pressure protection for new motors and those with flat tappet camshafts. This additive ensures faster break-in and reduced blow-by during the initial operation, making it ideal for race applications where performance is crucial.

Users appreciate how it helps new rings seat properly, maximizing engine performance from the start. Its formulation is safe for use with both conventional and synthetic motor oils, making it a versatile option for various setups.

For anyone with a new engine or those looking to enhance the break-in process, Lucas Oil 10063 is an excellent choice. Its focus on extreme pressure protection makes it a must-have for performance enthusiasts and those investing in new motors.

Pros Cons
  • Provides excellent extreme pressure protection
  • Ideal for new engines and break-in periods
  • Compatible with all oil types
  • Helps seat new rings effectively
  • Tested for performance in racing applications
  • More specialized, not needed for all engines
  • Higher price point compared to standard additives

Winners And Losers

When comparing these eight engine oil additives, specific products stand out in various categories. For overall performance enhancement, BestLine Racing Nano-Lubricant takes the lead with its significant friction reduction and versatility across engine types. If you’re dealing with oil leaks, Lucas Oil Stop Leak is a reliable choice, while LIQUI MOLY excels at reducing oil consumption.

For those with high-mileage vehicles, TriboTEX offers groundbreaking technology that rejuvenates older engines, making it a top contender. Conversely, REV X ZDDP is a must-have for flat tappet engines, ensuring they receive the protection they need during break-in periods.

To Sum Up

In this exploration of engine oil additives, we’ve highlighted some of the best options available in 2025. Each product has unique advantages tailored to specific needs, from enhancing performance to preventing leaks. Whether you prioritize fuel efficiency, noise reduction, or engine protection, there’s an additive on this list for you.

As you consider your options, think about your vehicle’s specific requirements and how these products can help address them. Investing in the right engine oil additive can lead to significant improvements in performance and longevity, ensuring your vehicle runs smoothly for miles to come.

Buying Guide

When it comes to choosing the right engine oil additive, understanding what makes a good product is essential. Look for additives that are specifically formulated for your engine type, whether it’s gasoline or diesel. Compatibility is crucial, as using the wrong additive can lead to subpar performance or even damage.

Another important aspect is the formulation of the product. Some additives feature advanced technologies like nanotechnology or specialized synthetic materials that can provide superior protection and efficiency. If you’re aiming for long-term benefits, consider options that not only enhance performance but also contribute to the overall health of your engine over time.

Lastly, think about ease of use and application. Many engine oil additives come with clear instructions, making them user-friendly for everyone. Selecting a product that fits well into your maintenance routine can make all the difference in keeping your engine running at its best.

As an Amazon Associate we earn from qualifying purchases.

About the author

The Motor Guy

The Motor Guy is a passionate car enthusiast with a love for troubleshooting and diagnosing all sorts of vehicle problems.

With years of experience in OBD diagnostics, he has become an expert in identifying and solving complex automotive issues.

Through TheMotorGuy.com, he shares his knowledge and expertise with others, providing valuable insights and tips on how to keep your vehicle running smoothly.

Qualifications:
- 12 years experience in the automotive industry
- ASE Master Automobile Technician
- A Series: Automobile and Light Truck Certification, A9 Light Vehicle Diesel Engine Certification
- Bachelor's Degree in Information Systems