Top 5 Ranked Products
We analyzed millions of Amazon products to handpick the top recommendations just for you.

#1 Ranked
Liqui Moly 20004 Hydraulic Lifter Additive 300 ml
Price: $14.95
Rating: ★★★★★
ASIN: B0096Y6XPC
Score: 93%
Overview:
The Liqui Moly 20004 Hydraulic Lifter Additive is a specialized automotive product designed to enhance the performance of engine oil in vehicles. With a volume of 300 ml, this additive is particularly effective in improving lubrication properties, which is crucial for maintaining engine efficiency and longevity. It is suitable for use in a variety of vehicles, including those equipped with turbochargers and catalytic converters, making it versatile for different engine types.
In addition to improving lubrication, the additive also cleans valve bores, which helps prevent the buildup of sludge and deposits that can hinder engine performance. One of its key benefits is the reduction of engine noises caused by hydraulic tappets, contributing to a smoother and quieter engine operation. The product boasts a flash point of 60.0 degrees Celsius, indicating a relatively safe application under normal operating conditions.
Pros:
- Improved Lubrication: Enhances the lubrication properties of engine oil, promoting better engine performance.
- Cleaning Action: Effectively cleans valve bores, reducing sludge and deposit buildup.
- Noise Reduction: Prevents engine noises caused by hydraulic tappets, leading to quieter operation.
Cons:
- Limited Volume: At 300 ml, it may require multiple applications for larger engines.
- Specific Use Cases: Primarily beneficial for vehicles with hydraulic tappets, which may limit its effectiveness for other engine types.
- Flash Point Concerns: While the flash point is moderate, it may still pose risks if not handled properly during application.

#2 Ranked
LIQUI MOLY Oil Additive Cera Tec 20002 Ceramic Wear & Tear Protection for Petrol & Diesel Engines Smoother Engine Performance, Less Friction & Lower Fuel Consumption 300 ml
Price: $24.90
Rating: ★★★★★
ASIN: B001CZODH8
Score: 95%
Overview:
The LIQUI MOLY Oil Additive Cera Tec 20002 is designed to enhance engine performance by providing superior wear and tear protection for both petrol and diesel engines. This 300 ml additive is engineered to reduce friction, leading to smoother operation and improved fuel efficiency. Its formulation allows it to mix seamlessly with all commercially available motor oils, making it a versatile choice for vehicle owners seeking to prolong engine life and optimize performance.
The additive is particularly notable for its stability under high thermal and dynamic loads, ensuring that it maintains its protective qualities even in demanding driving conditions. Additionally, it does not leave deposits and is compatible with all commonly used filter systems, which simplifies its application. The product's ability to resist extreme temperatures further enhances its reliability, making it suitable for a wide range of operating environments.
Pros:
- Compatibility: Mixable with all commercially available motor oils, enhancing versatility.
- Thermal Stability: Stable under high thermal and dynamic loads, ensuring consistent performance.
- Temperature Resistance: Resists extremely high and low temperatures, making it suitable for various driving conditions.
Cons:
- Quantity Limitation: The 300 ml size may be insufficient for larger engines or multiple applications.
- Initial Cost: Higher upfront cost compared to standard oil additives may deter some consumers.
- Effectiveness Variability: Performance improvements may vary depending on the specific engine type and condition.

#3 Ranked
Liqui Moly Pro-Line Engine Flush | 500 ml | Oil additive | SKU: 2037
Price: $17.99
Rating: ★★★★★
ASIN: B00CR3RXTO
Score: 94%
Overview:
The Liqui Moly Pro-Line Engine Flush is a specialized oil additive designed to clean and flush the oil systems of both gasoline and diesel engines effectively. With a volume of 500 ml, this product facilitates a gentle yet rapid cleaning process that helps maintain engine performance by removing sludge and deposits. Its formulation is designed to be neutral to seals and other materials within the engine, ensuring compatibility and safety during use. Additionally, it is compatible with catalytic converters, making it a versatile choice for various engine types.
The Liqui Moly Pro-Line Engine Flush is straightforward to use, allowing users to incorporate it into their regular maintenance routine without complications. By promoting a cleaner engine environment, it can contribute to improved engine efficiency and longevity. However, potential users should consider the specific requirements of their engine systems and follow the manufacturer's instructions for optimal results.
Pros:
- Gentle Cleaning: Effectively cleans oil systems without damaging engine components.
- Compatibility: Safe for use with seals and catalytic converters, enhancing versatility.
- Ease of Use: Simple application process integrates easily into regular maintenance.
Cons:
- Limited Volume: The 500 ml size may not be sufficient for larger engines or multiple flushes.
- Niche Use: Primarily designed for flushing, not a standalone oil replacement or additive.
- Specific Instructions: Requires adherence to guidelines for effective results, which may be complex for some users.

#4 Ranked
Liqui Moly 20004 Hydraulic Lifter Addtive (2 Pack)
Price: $21.98
Rating: ★★★★☆
ASIN: B0725BXPCV
Score: 93%
Overview:
The Liqui Moly 20004 Hydraulic Lifter Additive is designed to enhance the performance of hydraulic lifters in automotive engines. This product aims to reduce noise and improve the functionality of lifters, which can become sluggish over time due to deposits and wear. By adding this product to the engine oil, users can potentially restore lifter performance and prolong engine life, making it a valuable addition for those looking to maintain or improve their vehicle's engine health.
The additive is packaged in a convenient two-pack, allowing for multiple applications or for use in different vehicles. While no specific features are listed, the formulation is intended to clean and protect hydraulic lifters, which can lead to smoother engine operation and reduced wear. This product is particularly beneficial for older vehicles or those that have experienced issues with lifter noise or performance.
Pros:
- Noise Reduction: Effectively minimizes the noise produced by hydraulic lifters.
- Engine Performance: Aids in restoring the functionality of sluggish lifters, enhancing overall engine performance.
- Convenient Packaging: Comes in a two-pack, offering value and flexibility for multiple uses.
Cons:
- Application Limitations: May not be suitable for all engine types, requiring careful consideration before use.

#5 Ranked
Motorkote MK-HL32-06 Heavy Duty Hyper Lubricant Engine Treatment, 32-Ounce, Single, Black
Price: $41.18
Rating: ★★★★☆
ASIN: B000EGAM0I
Score: 86%
Overview:
The Motorkote MK-HL32-06 Heavy Duty Hyper Lubricant Engine Treatment is a versatile engine additive designed to enhance the performance and longevity of various types of engines, including gas and diesel. This 32-ounce treatment is compatible with all brands of synthetic and petroleum-based oils, making it suitable for a wide range of vehicles and equipment, from automobiles to heavy-duty machinery. Its formulation is engineered to increase horsepower, lower operating temperatures, and reduce engine noise and vibration, thereby promoting a smoother and more efficient operation.
In addition to its performance-enhancing properties, the Motorkote lubricant is designed for easy application, with specific usage recommendations for different systems, including crankcases, transmissions, and hydraulic fluids. The product is noted for its durability, as it lasts through multiple fluid changes and can be used more frequently for optimal results. Furthermore, the lubricant's water resistance ensures that it maintains its protective qualities even in wet conditions, making it a reliable choice for various applications.
Pros:
- Compatibility: Works with all brands of synthetic and petroleum-based oils.
- Performance Enhancement: Increases horsepower and reduces engine noise and vibration.
- Versatile Usage: Suitable for various applications, including automobiles, trucks, and heavy-duty equipment.
Cons:
- Specific Measurement Requirements: Requires precise measurement for optimal effectiveness, which may be inconvenient for some users.
- Limited Brand Recognition: May not be as widely recognized as other lubricants in the market.
- Potential Overuse: Users might be tempted to use more than recommended, leading to unnecessary expenditure.
Product Information & Tips
Overview
Noisy lifters in an engine can lead to a variety of performance issues, including reduced efficiency, increased wear, and potential engine damage. This problem is often attributed to insufficient lubrication, contamination, or wear and tear in the lifters themselves. As a result, many car enthusiasts and mechanics seek effective additives to mitigate the noise and restore optimal functioning.
Additives formulated specifically for noisy lifters are designed to enhance lubrication, clean internal components, and reduce friction. These products can vary significantly in their composition and effectiveness, making it crucial to identify the best options available in the market. Understanding the key criteria for selecting an additive can help consumers make informed decisions and achieve the desired results in their engines.
Key Criteria
1. Lubrication Properties:
- Effective additives should improve the lubrication of lifters, reducing friction and wear. Enhanced lubrication can help restore quiet operation and prolong the lifespan of engine components.
2. Cleaning Agents:
- Additives that contain cleaning agents are vital for removing sludge and deposits that may be causing lifter noise. A clean engine allows for better oil flow and reduces the chances of lifter sticking.
3. Compatibility with Engine Oil:
- It is essential for the additive to be compatible with the existing engine oil. Incompatible products can lead to adverse reactions, affecting engine performance and potentially causing damage.
4. Viscosity Modifiers:
- Additives that include viscosity modifiers can help maintain optimal oil thickness, ensuring proper lubrication under various operating conditions. This is especially important in high-temperature scenarios.
5. User Reviews and Reputation:
- The effectiveness of an additive can often be gauged through user reviews and brand reputation. Products that have a history of success in addressing noisy lifters are generally more reliable.
Frequently Asked Questions
Q1: What causes noisy lifters?
A1: Noisy lifters can be caused by low oil levels, dirty oil, worn lifters, or insufficient lubrication, leading to increased friction and noise.
Q2: How do additives work for noisy lifters?
A2: Additives work by enhancing lubrication, cleaning engine components, and reducing friction, which can help restore quiet operation in noisy lifters.
Q3: Can I use any additive for noisy lifters?
A3: Not all additives are suitable for every engine type. It's crucial to choose an additive that is compatible with your specific engine oil and meets the necessary criteria.
Q4: How often should I use additives for noisy lifters?
A4: The frequency of use depends on the product and the severity of the issue. Generally, additives can be used during oil changes or as needed based on the manufacturer's recommendations.
Q5: Are there any risks associated with using additives?
A5: While many additives are safe, using the wrong product or excessive amounts can lead to oil breakdown or engine damage. Always follow the manufacturer's instructions.
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