Best Engine Oil Additive: Transforming Good to Great for Your Engine

You’ve just changed your engine oil, and you’re about to close the hood when you remember hearing about engine oil additives. Are they just a gimmick, or can they elevate your engine’s performance? With years of automotive repair experience, I’ve delved into this space and seen their benefits first-hand. That is why I will share with you the critical things about engine oil additives, including the best ones the industry offers.
A man pours oil additive into the engine

Key Takeaways:

    • Additives: Carefully crafted substances included in engine oils to offer additional benefits.
    • Top Oil Additives: Liqui Moly Cera Tec and Lucas Oil Stabilizer are among the world’s go-to additives.
    • Choosing the Right Product: Select the additive that best suits your needs, and enjoy an excellent engine performance.

Understanding Engine Oil Additives

Engine oil additives are inorganic or organic compounds meticulously crafted, formulated, and dissolved into engine oils as solids. They come in various forms, performing a variety of duties. Some examples include;

  • Detergents
  • Dispersants
  • Foam inhibitors
  • Antioxidants
  • Friction modifiers

Altogether, these play a vital role in ensuring the engine performs well and efficiently. This, in turn, fosters good engine health and longevity.

Top Engine Oil Additives

Liqui Moly Cera Tec Friction Modifier (Best Overall)

LIQUI MOLY Oil Additive Cera Tec 3721 Ceramic Wear & Tear Protection

The Liqui Moly Cera Tec Friction Modifier is by far the maestro of the oil additive game. There are many reasons for this. The most notable one is its ceramic technology, which creates a high-pressure film on engine surfaces. With this, users’ machines are safeguarded from friction and wear.

Liqui also has a unique formula that fosters engine performance and fuel efficiency. We cannot forget its versatility, allowing it to be used on diesel and gasoline engines. 

The well-rounded capabilities of the Liqui Moly are what sets it apart from the rest. This, of course, pushes it to be crowned as the best.


  • Offers advanced ceramic technology
  • Can serve the needs of both diesel and gasoline machines
  • Enhances engine performance


  • Quite costly

Fact: This is one of the few additives that reduce friction through the impressive nano-ceramic particles.

Price: $27.09 (Amazon)

Lucas Oil Stabilizer (For High-Mileage Vehicles)

LUCAS OIL High Mileage Oil Stabilizer, 1 quart, Multi

If you are looking for an additive with great offerings that stand out, you are in the right place. The Lucas Oil Stabilizer is an incredibly versatile product. This is because it is compatible with numerous vehicle engines. 

The multifaceted additive is also imperative in fostering optimal oil circulation and lubrication. The most loveable feature is its unmatched capability to reduce engine heat. All of this makes it ideal for use in high-mileage and performance vehicles.


  • Highly versatile
  • Effective in heat reduction
  • Fosters oil circulation and lubrication


Price: $12.54 (Amazon)

STP High Mileage Oil Treatment (For Older Engines)

STP High Mileage Oil Treatment + Stop Leak

If there was a product custom-made and designed to serve every inch and need of older engines, then the undoubted master is here. As the name suggests, the STP High Mileage Oil Treatment is an exceptional high mileage additive critical in rejuvenating older/aging machines. 

The Zinc anti-wear agents are one of the things that help the additive shield the engine against wear. One would also find potent detergents that help ensure your engine stays clean. So, for anyone looking to restore their engines to their previous glory, choosing the STP High mileage additive should be a straightforward thing.


  • Protects and rejuvenates high-mileage engines
  • Prevents wear and tear thanks to its zinc anti-wear properties
  • Its detergents facilitate cleanliness 


  • Less essential for newer vehicles

Price: From $6.01 (Amazon)


Peak engine performance, cleanliness, and fuel efficiency are among the long list of benefits of using additives. This explains why experts, including myself, always advocate for their inclusion. 

Even when doing so, always check the bottle to ensure that the additives offer what you need. These substances come in various forms, each designed to suit a particular situation. From high-performance engines to older ones, each does its specified job. All in all, with the information I have given you, you can never go wrong.

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Picture of Victor Shvetsov
Victor Shvetsov
Victor is a car technician with 10 years of experience in the auto repair industry. He's an enthusiast of blogging and he likes nothing more than spending his weekends working on his car.

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