Stanadyne Diesel Fuel Additive Pack of 4 (4×16 oz) — Cleans Injectors & Boosts Cetane for Better MPG

Stanadyne Performance Formula is a concentrated diesel fuel additive sold as a pack of four 16 oz pint bottles that cleans injectors, improves cetane, restores lubricity, and treats up to 240 gallons of diesel fuel per pack.

Engineered for modern diesel systems, this four-pack of Stanadyne Performance Formula delivers detergents, cetane-boosting components, lubricity agents, corrosion inhibitors, and demulsifiers in every dose. Each 16 oz bottle treats 60 gallons; the full pack treats 240 gallons. The formula is designed for ultra low sulfur diesel and is compatible with biodiesel blends up to B20 without alcohol. Independent testing and product data highlight fuel economy gains, improved cold-weather operability, and reduced deposits that affect performance and emissions.

How will this additive affect fuel economy?

Stanadyne Performance Formula contains deposit-control detergents and combustion improvers that can enhance combustion efficiency. Independent tests show average MPG improvement of around 4% with peak gains up to 9.6%, depending on vehicle, driving conditions, and maintenance.

• Average fuel economy improvement ~4% in independent tests
• Gains up to 9.6% under favorable conditions
• Treats 60 gallons per 16 oz bottle for controlled dosing

Will it protect and clean my engine’s fuel system?

The formula includes detergents and deposit modifiers that clean injectors, pumps, and nozzles to restore spray patterns and combustion consistency. Over time this helps recover lost power and smooth out rough idling without harming exhaust aftertreatment systems.

• Detergents remove deposits in injectors and injection systems
• Deposit modifiers help maintain injector and pump performance
• Safe for exhaust aftertreatment when used as directed

How does it perform in cold weather and with biodiesel?

Performance Formula improves pour point and cold filter plug point, helping diesel flow at lower temperatures depending on the base fuel. It is specifically formulated for ultra low sulfur diesel and is proven compatible with biodiesel up to B20, improving water separation in higher bio blends.

• Improves pour point up to 40°F (22°C) depending on base fuel
• Improves cold filter plug point by as much as 25°F (13°C)
• Compatible with biodiesel blends up to B20; improves water separation

Does it address lubricity, water, and corrosion?

Yes. Lubricity enhancers restore protection lost in ultra low sulfur fuels, while corrosion inhibitors protect metal components. Special demulsifiers encourage tiny water droplets to coalesce so filters and separators remove water more effectively.

• Restores lubricity to protect pumps and injection components
• Corrosion inhibitors defend against rust in fuel systems
• Demulsifiers help remove suspended water via filters and separators

Who is this pack for? This four-bottle pack is suited to fleet managers, commercial operators, agricultural users, marine owners, and diesel enthusiasts who want a concentrated, proven additive to maintain modern diesel engines. It’s helpful when servicing older equipment with deposit buildup, for vehicles running low-lubricity ultra low sulfur diesel, and for operators who need improved cold-weather starting or enhanced fuel economy. Use as directed to treat fuel volumes indicated; the pack covers 240 gallons total and is intended for users wanting measurable system cleaning, lubricity restoration, and improved combustion without altering emissions control hardware.