We researched and compared seven of the most popular diesel engine cleaner additives on Amazon, evaluating them against manufacturer specifications, industry standards like ASTM D975, and aggregated owner feedback. Our goal is to help you choose the right product for your diesel engine, whether you need injector cleaning, carbon deposit removal, or cetane boost. We do not claim to have performed lab tests or long-term mileage trials; instead, we present a data-driven analysis of each product’s claims and real-world user experiences.
Each additive was scored on performance, durability, value, ease of use, and safety based on published specs and typical owner reports. We highlight genuine weaknesses and who should consider skipping each pick. Prices are not discussed; value is assessed relative to the product’s effectiveness and quantity.
| Photo | Product | Score | Buy |
|---|---|---|---|
 |
Lucas Oil 10016 Fuel Treatment Best All-Round Cleaner 1 gallon treats up to 300 gallons of diesel |
9.0 | 🛒 Check Price |
 |
Stanadyne Performance Formula Top for Injector Cleaning 16 oz treats up to 100 gallons of diesel |
8.7 | 🛒 Check Price |
 |
Hot Shot's Secret Diesel Extreme Best for Carbon Removal 32 oz treats up to 100 gallons of diesel |
8.4 | 🛒 Check Price |
 |
Power Service Diesel Kleen + Cetane Boost Best Value Cetane Boost 1 gallon treats up to 300 gallons of diesel |
8.1 | 🛒 Check Price |
 |
Liqui Moly Diesel Purge Best Direct Injector Cleaner 1 liter treats up to 20 gallons via direct injection |
8.8 | 🛒 Check Price |
 |
Archoil AR6400-D Fuel Additive Best for Friction Reduction 16 oz treats up to 128 gallons of diesel |
7.8 | 🛒 Check Price |
 |
Rislone Diesel Fuel System Cleaner Budget Pick 16 oz treats up to 40 gallons of diesel |
7.3 | 🛒 Check Price |
1. Lucas Oil 10016 Fuel Treatment: Best All-Round Cleaner
The Lucas Oil 10016 Fuel Treatment is a versatile additive that combines cleaning, lubrication, and cetane improvement. In our evaluation, it stands out for its broad compatibility and high value, as a single gallon treats up to 300 gallons. Owner feedback consistently notes reduced engine noise and smoother idle after a few tanks. However, for engines with heavy carbon deposits, this product is a maintenance cleaner rather than a heavy-duty decarbonizer.
This additive is ideal for regular use to keep fuel systems clean, but if you need to address existing severe injector fouling or stuck rings, consider a more aggressive cleaner. Skip it if you require a one-shot strong decarbonizing treatment.
- Reduces injector deposits and lubricates fuel system components
- Contains cetane improver for smoother combustion
- Compatible with all diesel engines including modern common rail
Pros: Excellent value for the volume; Effective at reducing noise and smoke based on owner reports
Cons: Less effective on severe carbon buildup compared to stronger formulas
2. Stanadyne Performance Formula: Top for Injector Cleaning
The Stanadyne Performance Formula is a specialized injector cleaner that we found highly rated among owners of modern common rail diesels. Its formulation targets injector deposits and meets several OEM standards, which adds credibility. Owner feedback often highlights restored fuel economy and smoother operation after use. However, its higher price per ounce means it is less economical for routine maintenance compared to Lucas.
This product is best for those with injector-related issues like rough idle or reduced power. Skip it if you are looking for a budget-friendly all-in-one additive or need to address carbon buildup in the combustion chamber.
- Specifically formulated for injector deposit removal
- Meets OEM specifications for Cummins, Detroit Diesel, and more
- Includes demulsifier to separate water from fuel
Pros: Proven effectiveness on injector deposits per user reports; Trusted by many diesel mechanics
Cons: Higher cost per treatment than some alternatives; Not a complete fuel system cleaner for heavy carbon
3. Hot Shot's Secret Diesel Extreme: Best for Carbon Removal
Hot Shot’s Secret Diesel Extreme is a heavy-duty cleaner designed to tackle carbon deposits in injectors, combustion chambers, and even DPF systems. In our research, owner reports indicate significant smoke reduction and restored power after a single treatment. However, its aggressive formula can produce temporary smoke or a strong odor as deposits are dislodged, which some users find concerning.
This additive is suitable for engines with noticeable carbon buildup or DPF regeneration issues. Skip it if you prefer a mild additive for regular maintenance, as its strength makes it better for occasional deep cleaning.
- High concentration of detergents for carbon deposit removal
- Reduces exhaust smoke and regenerates DPF in some cases
- Contains cetane booster and lubricity agents
Pros: Strong decarbonizing effect reported by owners; Can help with DPF regeneration issues
Cons: May cause temporary smoke or odor during cleaning; Not recommended for continuous use; periodic only
4. Power Service Diesel Kleen + Cetane Boost: Best Value Cetane Boost
Power Service Diesel Kleen + Cetane Boost is a popular choice for everyday diesel maintenance. We found it offers a good balance of cleaning and cetane improvement at a low per-treatment cost. Owner feedback often praises its ability to reduce winter starting issues and minor injector deposits. However, for engines with significant carbon buildup or performance issues, it may not provide the dramatic results of stronger additives.
This product is ideal for preventive maintenance and cold weather operation. Skip it if you need a powerful decarbonizer or injector cleaner for a neglected engine.
- Cetane boost improves cold starts and reduces noise
- Detergent additives clean injectors and prevent deposits
- Alcohol-free formula safe for all diesel engines
Pros: Excellent value per gallon; Improves cold weather performance
Cons: Less effective on heavy carbon compared to specialty cleaners; Some users report minimal improvement in older engines
5. Liqui Moly Diesel Purge: Best Direct Injector Cleaner
Liqui Moly Diesel Purge is a unique product that we evaluated as a direct cleaning method. Instead of being added to the fuel tank, it is typically introduced directly to the fuel system via a separate line, allowing concentrated cleaning. Owner reports from diesel forums describe significant improvements in injector performance and idle smoothness. However, the application process is more involved and may not be suitable for all users.
This additive is best for DIY enthusiasts or mechanics who want a thorough injector cleaning. Skip it if you prefer a simple pour-in additive or are not comfortable with a more complex procedure.
- Used as a direct fuel system cleaner via a separate fuel line
- Removes tough deposits from injectors and combustion chambers
- Highly recommended by European diesel specialists
Pros: Exceptional cleaning power for injectors; Professional-grade results without removing injectors
Cons: Requires special application procedure (not pour-in); Low value per treatment due to small volume
6. Archoil AR6400-D Fuel Additive: Best for Friction Reduction
Archoil AR6400-D is marketed as a friction-reducing additive that also cleans. In our research, owner feedback is mixed: some report quieter operation and better fuel economy, while others see little change. Its cleaning capability is adequate for light deposits but not for heavy carbon. The value is moderate given the concentration.
This product may benefit high-mileage engines where friction reduction is a priority. Skip it if you need a strong decarbonizer or injector cleaner, as its primary strength is lubrication.
- Contains friction modifier to reduce wear
- Cleans injectors and improves fuel economy
- Compatible with biodiesel blends up to B20
Pros: Reduces engine noise and vibration per owner feedback; Good for older engines with high mileage
Cons: Modest cleaning power compared to dedicated cleaners; Some users report no noticeable improvement
7. Rislone Diesel Fuel System Cleaner: Budget Pick
Rislone Diesel Fuel System Cleaner is an entry-level additive that we found offers basic cleaning and lubrication at a low price. Owner feedback indicates it works well for preventive maintenance but struggles with heavy deposits. Its lower concentration means you need to use it more often, which can offset the initial savings.
This additive is suitable for those on a tight budget or for light-duty cleaning. Skip it if you have a heavily carbonized engine or want a high-performance cleaner, as it may not deliver the desired results.
- Cleans fuel injectors and removes deposits
- Lubricates fuel pump and injectors
- Safe for all diesel engines including those with DPF
Pros: Low cost per bottle; Simple pour-in application
Cons: Lower concentration requires more frequent use; Less effective on severe buildup per owner reports
Frequently Asked Questions
How often should I use a diesel engine cleaner additive?
For preventive maintenance, many manufacturers recommend using a cleaner additive every 3,000 to 5,000 miles or at each oil change. For heavy-duty cleaning, products like Hot Shot’s Secret Diesel Extreme are designed for occasional use every 15,000 miles or when symptoms appear. Always follow the product’s instructions and your vehicle’s maintenance schedule.
Can diesel additives damage my engine or DPF?
Most reputable additives are safe for all diesel engines including those with DPF, as long as they are used as directed. However, some aggressive cleaners may cause temporary smoke or odor. Avoid additives that contain high levels of metallic compounds, as they can harm DPF systems. Stick to products that meet OEM specifications.
Will a diesel cleaner improve fuel economy?
Many owners report improved fuel economy after using a cleaner, especially if injectors were partially clogged. The improvement varies based on the engine condition. In our research, additives with cetane boosters and detergents tend to show more consistent gains. However, results are not guaranteed and depend on the baseline condition of the fuel system.
What is the difference between a fuel stabilizer and a cleaner?
A fuel stabilizer prevents fuel degradation during storage, while a cleaner removes deposits from injectors and combustion chambers. Some products combine both functions, but dedicated cleaners have higher detergent concentrations. For cleaning purposes, choose a product labeled as a cleaner or fuel system treatment rather than a stabilizer.
Can I use a gasoline additive in my diesel engine?
No, gasoline additives are formulated differently and can damage a diesel engine. Always use additives specifically designed for diesel fuel. Diesel additives address issues like cetane rating, lubricity, and injector deposits that are unique to diesel engines.
Our Verdict
After researching and comparing these seven diesel engine cleaner additives, our top pick is the Lucas Oil 10016 Fuel Treatment for its excellent balance of cleaning, lubrication, and value, making it suitable for most diesel owners. For those needing stronger injector cleaning, the Stanadyne Performance Formula is a close runner-up, especially for modern common rail engines.
