Diesel truck owners look for additives that improve fuel economy, keep injectors clean, and protect fuel systems. The top options below are selected for reliability, established performance benefits, and clear benefits for common diesel use cases such as daily driving, heavy-duty work, or frequent long hauls. Each product is best for a specific need — choose based on your priorities: everyday drivability, deep-cleaning power, or fuel-system lubrication.
Summary of selected products:
| Product | Best For |
|---|---|
| Hot Shot’s Secret Everyday Diesel Treatment EDT 16 oz | Everyday maintenance and cetane boost |
| Hot Shot’s Secret Diesel Extreme 1 Gallon | Deep cleaning and cetane boost for regular use |
| Opti-Lube XPD All-Season Diesel Additive | Lubricity, cetane, and injector cleanliness for all weather |
| Lucas Oil 10003 Fuel Treatment 1 Quart | General tune-up and injector/system lubrication |
| Archoil AR6500 Diesel Treatment 40 oz | Lubricity boost and protection at every fill-up |
Hot Shot’s Secret Everyday Diesel Treatment EDT 16 oz
Key features include a six-in-one formula designed to boost performance and maintain engine health. It cleans fuel injectors, improves lubricity, and supports smoother operation on regular use. Best for daily drivers or fleets seeking ongoing cetane improvements and reduced maintenance costs.
Best for: daily diesel trucks and drivers who want an all-in-one additive for everyday upkeep. Caution: results depend on base fuel quality and engine type; avoid adding more than recommended with high-mileage engines without professional guidance.
Hot Shot’s Secret Diesel Extreme 1 Gallon
This concentrated additive is formulated to thoroughly clean the fuel system, lubricate critical components, and raise cetane by up to seven points. It aims to improve combustion efficiency and can reduce the frequency of exhaust aftertreatment regenerations in some setups. Best for owners seeking a strong clean-and-lubricate routine with a cetane lift.
Best for: trucks with noticeable injector or fuel-system buildup, or drivers wanting a powerful cetane boost. Caution: for some engines, cleaner concentrates should be used as directed to avoid unintended effects on sensitive systems.
Opti-Lube XPD All-Season Diesel Additive
Opti-Lube’s XPD emphasizes lubricity for ULSD and claims to improve fuel economy across seasons while protecting against corrosion. It also cleans injectors and helps reduce deposits and emissions, supporting longevity in modern emissions-controlled engines. Best for: owners who want balanced lubrication, cleaning, and dependable year-round performance.
Caution: effects on fuel economy can vary with driving style and vehicle condition; verify compatibility with your emissions system if you’re using other additives.
Lucas Oil 10003 Fuel Treatment
Lucas Oil’s classic fuel treatment is marketed as a universal tune-up in a bottle, suitable for gasoline and diesel engines. It cleans and lubricates the fuel system, including injectors and the combustion chamber, while aiming to increase miles-per-gallon. Best for: budget-conscious buyers seeking a versatile, widely trusted additive for fleet or personal use.
Limitation: as with many general-purpose formulas, results may vary by engine type and fuel quality; ensure you do not double-dose with other competing lubricity-focused products.
Lucas Oil 10013 Fuel Treatment
This gallon size repeats Lucas’s proven approach, offering a robust blend to treat both gasoline and diesel, with emphasis on increased MPG and cleaner fuel delivery. Best for: users who want a long-lasting additive supply and consistent engine cleanliness across engines with higher mileage.
Limitation: as with any multi-use additive, confirm diesel-specific guidance when mixing with gasoline-focused products to avoid conflicting formulations.
Archoil AR6500 Diesel Treatment 40 oz
Archoil AR6500 focuses on lubricity improvement and fuel-system protection, treating up to 400 gallons per bottle. It also supports deposit control in DPFs and turbo systems and acts as a cetane booster. Best for: owners needing a dedicated lubricity and deposit-control product that pairs with modern HPCR engines.
Caution: use as directed to avoid oversaturation in ultra-low sulfur diesel blends; confirm compatibility with your engine’s fuel system materials.
Buying Guide
What should you consider when choosing a diesel fuel additive for a truck?
- Purpose: Are you seeking a cetane boost, injector cleaning, lubricity improvement, or all three? Choose accordingly.
- Engine type and age: Newer HPCR engines may respond differently to certain additives than older designs.
- ULSD compatibility: Ensure the product is formulated for ultra-low sulfur diesel to protect fuel-system components.
- Frequency of use: Daily drivers may benefit from an everyday-treatment formula, while occasional users might prefer a larger-volume concentrate.
- Deposit concerns: If you notice injector or deposit issues, prioritize cleaners that target IDIDs and EDIDs and offer proven lubricity benefits.
Practical comparison notes:
- Best for everyday use with cetane boost: Hot Shot’s Secret Everyday Diesel Treatment EDT 16 oz or EDT 1 Gallon.
- Best for deep cleaning and powerful cetane lift: Hot Shot’s Secret Diesel Extreme 1 Gallon.
- Best overall lubricity and injector protection: Archoil AR6500.
- Best all-round value and universal use: Lucas Oil Fuel Treatments (10003 or 10013).
- All-season protection with injector cleanliness: Opti-Lube XPD All-Season.
FAQ
- Do diesel fuel additives improve mpg?
Many additives claim mpg improvements by boosting cetane or improving combustion. Real-world results vary with driving style and engine condition.
- Can I mix multiple diesel additives?
Generally, avoid mixing different brands or formulas without manufacturer guidance, as interactions may reduce effectiveness or cause engine issues.
- How often should I use these products?
For everyday drivers, follow the product’s daily-use directions. Deep-cleaning concentrates are typically used intermittently as directed.
- Are these additives compatible with all diesel engines?
Most are designed for a wide range of diesel engines, including modern HPCR systems. Check the label for compatibility with your engine type.
- Will additives affect diesel particulate filter (DPF) life?
Some products claim smoother regenerations and cleaner deposits, which can influence DPF behavior. Always follow the manufacturer’s use guidelines.
- What’s the difference between cetane boost and cleaning agents?
Cetane boosters improve ignition quality and combustion efficiency, while cleaners remove deposits from injectors and fuel-path components.