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Maintaining a clean and efficient fuel system is crucial for optimal engine performance and longevity. Fuel system additives work to remove deposits, prevent corrosion, and improve fuel economy. Selecting the right additive can help ensure your vehicle runs smoothly and reliably for years to come.
DESIGNED TO EXCEED EXPECTATIONS: Red Line complete SI-1 fuel system cleaner treatment for cleaning and preventing corrosion in fuel systems
PERFORM AND PROTECT: Fuel additive cleans injectors, carburetors, valve and combustion chamber deposits with a powerful, concentrated blend of high-temp and low-temp detergents
EFFICIENT FUEL BURN: Gas treatment that enhances gasoline stability, while reducing the build up of gum and varnish formation
EASY TO USE: Use one bottle per tank for most effective treatment, additive cleans nearly 100% efficiency in one treatment
DESIGNED TO EXCEED EXPECTATIONS: Red Line complete SI-1 fuel system cleaner is a premium fuel additive, providing an effective fuel treatment solution to clean and prevent corrosion in fuel systems.
PERFORM AND PROTECT: Fuel additive cleans injectors, carburetors, valve and combustion chamber deposits with a powerful, concentrated blend of high-temp and low-temp detergents
EFFICIENT FUEL BURN: A gas treatment that enhances gasoline stability, while reducing the build up of gum and varnish formation, leading to smoother operation and increased power output.
EASY TO USE: Use one bottle of Redline Fuel System Cleaner per tank for most effective treatment, additive cleans nearly 100% efficiency in one treatment
ENAHNCED ENGINE EFFCIENCY: Experience improved fuel economy and engine performance with Red Line 60103 SI-1 Complete Fuel System Cleaner, as it effectively removes deposits, for enhanced exhaust system function
PRESERVES FUEL: This fuel stabilizer ensures keeps gasoline fresh for up to 24 months for storing vehicles that are not in use, boats, outdoor power equipment during winter months, or stocking up on fuel.
PREVENTS CORROSION: Safeguard your engine & fuel system from the detrimental effects of both ethanol & non-ethanol fuels. Maintaining the integrity of fuel system components, it ensures optimal performance & longevity, promoting a healthier fuel system.
EASY STARTS: Guarantees quick & easy starts for your equipment & vehicles, providing peace of mind when storing them. With its reliable performance, you can confidently store your items, knowing they will start smoothly whenever needed.
DIRECTIONS: Pour contents directly into the fuel tank before adding gasoline. Use 1 oz of STA-BIL Storage for every 2.5 gallons of gas. After adding the fuel, run the engine for 5 minutes to treat the entire fuel system.
EXPIRATION DATE: 2 years from the opening of product, or 5 years from date of production (5-digit code on the back of the bottle; read as YYDDD). YY indicates the year of production. DDD represents the number of the day of that year of production.
Only STA-BIL’s scientifically designed proprietary formulas of antioxidants, anti-corrosives, & detergents protects all types of engines & is consistently ranked as America’s #1 fuel stabilizer, outperforming competition in independent lab testing.
TWO-STEP FUEL SYSTEM RESET: Includes AR6400-D Diesel Fuel System Cleaner + AR6500 Diesel Treatment (40 oz) for a complete clean-and-maintain solution
HOW IT WORKS: Use AR6400-D first for a deep clean (12 oz treats 30-40 gallons), then use AR6500 at every fill-up for ongoing protection (40 oz treats up to 400 gallons)
FOR ALL DIESEL ENGINES: Suitable for all diesel vehicles and equipment, including modern HPCR systems
CLEANS INJECTORS & RESTORES RESPONSE: Removes injector deposits and restores spray patterns for smoother running, improved response, and more efficient combustion
IMPROVES LUBRICITY (ASTM D6079): AR6500 is tested to improve lubricity by 43% to protect fuel system components, including wear-sensitive parts like the CP4 pump
BOOSTS CETANE UP TO +8: AR6500 raises cetane up to 8 points for faster ignition, smoother combustion, and improved drivability
SUPPORTS DPF & REDUCES REGENS: Targets deposit formation to help keep the DPF clean and reduce regeneration frequency - supporting performance and fuel economy
KEEPS TURBO CLEAN: Reduces deposit formation that impacts turbo response for restored boost and smoother acceleration
For best performance, follow the manufacturer's recommendations in your vehicle owner’s manual.
Cleans, restores, protects the entire fuel system (fuel injectors, carburetors, intake valves and combustion chambers)
Restores: lost power, acceleration, lost fuel economy, and operation of the fuel gauge sensor
Reduces: rough idle, engine surge, hesitation, and spark plus fouling
Improves: cold start performance, and fuel stability for up to one year
Automobiles and trucks use every 3,000 miles or at your next oil change. All other gasoline engines use as needed (motorcycles, dirt bikes, boats, ATVs, RVs, water craft, lawn care, etc.)
Extend the Life Of Your Vehicle: zMAX Engine & Fuel formulas are easy to use. Micro-lubrication soaks into metal surfaces, which improves lubricity and reduces carbon deposit build-up while boosting performance and protecting vital vehicle parts.
Engine Efficiency: Add zMAX Engine Formula to gain efficient combustion resulting in more power. Use at your routine oil change or every 6k miles for reduced engine wear, lower emissions and keep your engine running smoothly.
Fuel Conditioner: Pour zMAX Fuel Formula in the fuel tank to lubricate and maintain a clean fuel injector system. It improves fuel efficiency and performance and conditions the pumps and nozzles reducing carbon residue from the valves or pistons.
Trusted By Professionals & Dealerships: Stock zMAX in your garage to care for your car like a professional. From local repair shop mechanics to major car dealership groups, our formula is mechanic trusted. zMAX is USA-Made!
Reputable Craftsmanship and Performance: zMAX is proud to be the Official Micro-lubricant of Speedway Motorsports. Trusted for over 80 years, zMAX helps cut costs at the pump and extends your engine’s life.
Last update on 2026-09-01 / Affiliate links / Images from Amazon Product Advertising API
How to Choose the Best Fuel System Additives
Key Factors to Consider When Choosing a Fuel System Additive
When selecting a fuel system additive, consider the following key factors to ensure you choose a product that best suits your vehicle's needs:
Type of Additive: Fuel system cleaners are designed to tackle different issues. Some focus on cleaning fuel injectors, while others target the combustion chamber, intake valves, or the entire fuel system. Determine if you need a general cleaner or one specialized for a particular component. Look for additives that are safe for your vehicle's specific fuel type (gasoline or diesel) and compatible with emission control systems.
Formulation and Ingredients: The effectiveness of an additive often depends on its active ingredients. Common beneficial components include detergents, which break down carbon deposits, and lubricants, which reduce friction. Some additives also contain corrosion inhibitors to protect fuel system components. Research the ingredients to understand what the product claims to achieve and whether it aligns with your maintenance goals.
Brand Reputation and Reviews: Opting for additives from reputable brands with a proven track record can provide peace of mind. Positive user reviews and professional testimonials can offer insights into a product's real-world performance and reliability. Consider brands that invest in research and development and clearly state the benefits and usage instructions for their products.
Frequently Asked Questions
How often should I use a fuel system additive?
The frequency of use depends on the specific product and your vehicle's condition. Many additives are designed for single-use treatments, while others can be added with each fuel fill-up. It's best to follow the manufacturer's recommendations on the product label for optimal results and to avoid over-treatment.
Can fuel system additives harm my engine?
When used as directed, quality fuel system additives are generally safe for most engines. However, using an incorrect type of additive or exceeding the recommended dosage could potentially cause issues. Always choose products designed for your specific fuel type and vehicle model.
What are the signs that my fuel system needs cleaning?
Symptoms of a dirty fuel system can include reduced fuel economy, rough idling, hesitation during acceleration, and difficulty starting. If you notice any of these issues, a fuel system additive might help restore performance.
Are there different additives for gasoline and diesel engines?
Yes, it is crucial to use additives formulated specifically for either gasoline or diesel engines. These fuels have different properties and require specialized cleaning agents and treatments to be effective and safe for the respective fuel systems.
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