Stanadyne Lubricity Formula Diesel Additive — 16 oz Pint Case of 12, Concentrated Treats 125 gal

Stanadyne Lubricity Formula is a concentrated diesel fuel additive in 16 oz bottles that restores lubrication, protects injectors, and treats up to 125 gallons of fuel per bottle.

This 12-bottle case delivers an extra-strength lubricity improver designed for very dry or winter-blend fuels such as jet fuel, kerosene, or #1 diesel and for modern ultra-low sulfur diesel (ULSD). Each pint contains five times more lubricating content than other Stanadyne additives, making it a strong option when excessive fuel-system wear is a concern. It also helps demulsify water, reduce corrosion, keep fuel fresher, and is compatible with biodiesel blends up to B20. Note: shipping is limited to ground transport only.

How does this additive reduce injector and fuel-system wear?

The formula replenishes boundary lubrication that can be stripped from modern low-sulfur and winter-blend fuels. Improved lubrication reduces metal-to-metal contact inside pumps and injectors, extending component life without mechanical modification.

• Contains concentrated lubricity agents—five times more than other Stanadyne products
• Restores protective film on injectors and high-pressure pump surfaces
• Recommended for engines showing excessive wear or noise linked to fuel lubrication loss

Will it work with biodiesel and ultra-low sulfur diesel?

Yes—this formula is specially formulated for ULSD and is compatible with biodiesel blends up to B20. It addresses the common lubricant loss in low-sulfur fuels while remaining safe for typical diesel fuel systems and seals.

• Safe for ultra-low sulfur diesel (ULSD)
• Compatible with biodiesel blends up to 20% (B20)
• Contains no alcohol, reducing risk of phase separation or fuel-system stress

How does it handle water and corrosion in the fuel system?

Stanadyne Lubricity Formula includes demulsifying properties to separate water from fuel so filter/separator systems can remove it more effectively. It also contains inhibitors that slow corrosion and rust formation on metal surfaces inside the fuel system.

• Demulsifies water for improved filtration and separator efficiency
• Helps prevent rust and corrosion in tanks, lines, and injectors
• Helps keep stored fuel in better condition over time

How much fuel does one bottle treat and how often should I use it?

Each 16 oz (pint) bottle treats up to 125 gallons of diesel fuel at recommended dosing levels. Frequency depends on fuel quality and operating conditions; for very dry fuels, winter blends, or when wear is evident, use at each fill or follow manufacturer dosing guidance.

• One bottle treats approximately 125 gallons of diesel
• Use with each fill when using dry or winter-blend fuels for best protection
• Increase frequency for older equipment or if injector wear is observed

Who is this for? This case of 12 Stanadyne 16 oz bottles is suited to fleet managers, commercial operators, maintenance shops, and off-road users who rely on heavy-duty diesel engines or handle variable fuel supplies. It’s particularly useful where ultra-low sulfur or winter-blend fuels are common, where biodiesel up to B20 is used, or where visible injector/pump wear has been detected. The product is OEM-approved for use in modern diesel systems and is a practical preventative or corrective measure to protect fuel-system components and maintain fuel quality. Remember, this product ships by ground only.