10 Best Diesel Fuel Additive for Cp4 in 2026
Updated on
April 2026
#1
Best Choice
28% Off
- Maintains diesel engine performance and health with regular use.
- Boosts cetane levels by up to 7 points for improved fuel economy and reduced maintenance.
- Cleans fuel injectors and enhances fuel lubricity, increasing engine longevity.
- Prevents rust and corrosion while demulsifying moisture and stabilizing fuel.
- Easy application at each fill-up: 1 oz. or 2 oz. per 25 gallons of diesel.
- Scientifically formulated to enhance efficiency and prolong equipment life.
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- Maintains diesel engine performance and health with regular use.
- Boosts cetane levels by up to 7 points for improved fuel economy and reduced maintenance.
- Cleans fuel injectors and enhances fuel lubricity, increasing engine longevity.
- Prevents rust and corrosion while demulsifying moisture and stabilizing fuel.
- Easy application at each fill-up: 1 oz. or 2 oz. per 25 gallons of diesel.
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#2
Best Value
- Includes 40 oz of AR6500 Diesel Treatment
- Contains AR6400-D Diesel Fuel System Cleaner
- Restores critical fuel system components such as injectors, turbo, and DPF
- Enhances cetane levels to improve performance and fuel efficiency
- AR6400-D is not suitable for HEUI injector stiction issues; AR9100 Friction Modifier should be used instead
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- Includes 40 oz of AR6500 Diesel Treatment
- Contains AR6400-D Diesel Fuel System Cleaner
- Restores critical fuel system components such as injectors, turbo, and DPF
- Enhances cetane levels to improve performance and fuel efficiency
- AR6400-D is not suitable for HEUI injector stiction issues; AR9100 Friction Modifier should be used instead
#3
- 40.6 oz bottle treats 400 gallons of diesel fuel
- Designed to enhance performance and fuel economy in modern diesel engines
- Cleans post-combustion components, including turbochargers and DPFs, to prevent failure
- Utilizes advanced combustion modifier technology for improved power and engine response
- Cleans, lubricates, and protects the entire fuel system, including HPCR systems
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- 40.6 oz bottle treats 400 gallons of diesel fuel
- Designed to enhance performance and fuel economy in modern diesel engines
- Cleans post-combustion components, including turbochargers and DPFs, to prevent failure
- Utilizes advanced combustion modifier technology for improved power and engine response
- Cleans, lubricates, and protects the entire fuel system, including HPCR systems
#4
- Increases fuel lubricity by up to 56%, protecting fuel pumps and injectors from damage and improving performance of Ultra Low Sulfur Diesel (USLD).
- Extends the lifespan of fuel systems by safeguarding components from harsh fuels, ensuring smooth engine operation.
- Effectively lubricates the upper cylinder and critical engine components, reducing friction and wear to enhance overall engine performance.
- Compatible with both gasoline and diesel engines, and can be used alongside fuel stabilizers and treatments without harmful ingredients.
- Simple application: Use 1oz with every 10 gallons of fuel; safe for all engine types and recommended for each fill-up for optimal protection.
- Engineered for durability and efficiency, ensuring reliable performance and longevity of equipment.
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- Increases fuel lubricity by up to 56%, protecting fuel pumps and injectors from damage and improving performance of Ultra Low Sulfur Diesel (USLD).
- Extends the lifespan of fuel systems by safeguarding components from harsh fuels, ensuring smooth engine operation.
- Effectively lubricates the upper cylinder and critical engine components, reducing friction and wear to enhance overall engine performance.
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#5
- Designed to enhance diesel engine performance and maintain health for smooth operation.
- Boosts cetane levels by up to 7 points for improved fuel economy and lower maintenance costs.
- Cleans fuel injectors, improving lubricity to protect fuel system components and extend engine life.
- Demulsifies moisture and prevents oxidation, protecting fuel systems from rust and corrosion.
- Simple application: add 1 oz. or 2 oz. for every 25 gallons of diesel fuel at each fill-up.
- Engineered for performance and durability, ensuring high-quality solutions for your engine needs.
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- Designed to enhance diesel engine performance and maintain health for smooth operation.
- Boosts cetane levels by up to 7 points for improved fuel economy and lower maintenance costs.
- Cleans fuel injectors, improving lubricity to protect fuel system components and extend engine life.
- Demulsifies moisture and prevents oxidation, protecting fuel systems from rust and corrosion.
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#6
- Deeply cleans diesel engine fuel systems, including injectors, cylinders, fuel lines, and tanks, providing treatment for up to 6,000 miles.
- Effectively removes and prevents internal and external diesel injector deposits and varnish build-up.
- Increases cetane levels by up to 7 points, enhancing combustion, fuel efficiency, and engine performance while minimizing DPF regeneration.
- Improves fuel economy and maximizes mileage by optimizing engine performance and fuel combustion.
- Utilizes a non-alcohol-based water dispersant and rust inhibitors to prevent rust and keep diesel fuel moisture-free.
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- Deeply cleans diesel engine fuel systems, including injectors, cylinders, fuel lines, and tanks, providing treatment for up to 6,000 miles.
- Effectively removes and prevents internal and external diesel injector deposits and varnish build-up.
- Increases cetane levels by up to 7 points, enhancing combustion, fuel efficiency, and engine performance while minimizing DPF regeneration.
- Improves fuel economy and maximizes mileage by optimizing engine performance and fuel combustion.
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#7
- Enhances engine lubrication properties, supporting optimal performance for your truck.
- Improves fuel economy, offering better mileage and power across different driving conditions.
- Cleans fuel injectors to prevent residue buildup, reducing emissions and supporting vehicle emissions systems.
- Improves overall performance in various weather conditions, preventing fuel gel formation in cold temperatures.
- Cost-effective treatment for up to 512 gallons, suitable for trucks, farm, and construction equipment.
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- Enhances engine lubrication properties, supporting optimal performance for your truck.
- Improves fuel economy, offering better mileage and power across different driving conditions.
- Cleans fuel injectors to prevent residue buildup, reducing emissions and supporting vehicle emissions systems.
- Improves overall performance in various weather conditions, preventing fuel gel formation in cold temperatures.
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#8
- Cleans injectors and prevents sticking in both HPCR and older diesel systems
- Increases cetane rating by up to 6 numbers for smoother engine performance
- Compatible with all diesel fuels, including ULSD and biodiesel blends
- Universal fit
- Part number: 3064-06
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- Cleans injectors and prevents sticking in both HPCR and older diesel systems
- Increases cetane rating by up to 6 numbers for smoother engine performance
- Compatible with all diesel fuels, including ULSD and biodiesel blends
- Universal fit
- Part number: 3064-06
#9
- Restores horsepower by cleaning injection system deposits
- Improves fuel efficiency by an average of 4%, with potential gains up to 9.6%
- Enhances combustion with cetane improvers for better starting and quieter operation
- Restores lubricity in ultra-low sulfur diesel fuels to reduce engine wear
- Minimizes emissions, lowering smoke and particulate matter
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- Restores horsepower by cleaning injection system deposits
- Improves fuel efficiency by an average of 4%, with potential gains up to 9.6%
- Enhances combustion with cetane improvers for better starting and quieter operation
- Restores lubricity in ultra-low sulfur diesel fuels to reduce engine wear
- Minimizes emissions, lowering smoke and particulate matter
#10
- Restores horsepower by cleaning injection system deposits
- Improves fuel efficiency by an average of 4%, with potential gains up to 9.6%
- Enhances combustion with cetane improvers for better starting and quieter operation
- Restores lubricity in ultra-low sulfur diesel fuels to reduce engine wear
- Minimizes emissions, lowering smoke and particulate matter
Read More
- Restores horsepower by cleaning injection system deposits
- Improves fuel efficiency by an average of 4%, with potential gains up to 9.6%
- Enhances combustion with cetane improvers for better starting and quieter operation
- Restores lubricity in ultra-low sulfur diesel fuels to reduce engine wear
- Minimizes emissions, lowering smoke and particulate matter
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How We Estimate & Rank
We make shopping simple by hand-picking the top 10 Diesel Fuel Additive for Cp4 just for you. Our team focuses on what’s available right now, what’s popular with other shoppers, and, most importantly, what’s most relevant to your search. We cover leading brands such as Hot Shot's Secret, Archoil, Opti-Lube, Power Service, Stanadyne, and other trusted names in this category. By filtering out the noise, we ensure you only see high-quality options that actually meet your needs. It’s all the best finds, minus the endless scrolling!
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PRODUCTS SCANNED & ANALYZED
Final Recommendations
We’ve selected three standout options to make your choice easier.
BEST OVERALL
Our overall winner is Hot Shot’s Secret Everyday Diesel Treatment EDT 1 Gallon – Treats 3200 Gallons – 6-in-1 Diesel Fuel Additive by Hot Shot's Secret, earning top marks for its balanced combination of quality, performance, and price.
BEST VALUE
The best value for most shoppers is Archoil Diesel Fuel System Kit by Archoil, earning consistently positive feedback for its performance and accessible pricing.
BEST DEAL
The best deal available right now for Diesel Additives is Hot Shot’s Secret Everyday Diesel Treatment EDT 1 Gallon – Treats 3200 Gallons – 6-in-1 Diesel Fuel Additive by Hot Shot's Secret, now offered at 28% off.