Stanadyne Performance Formula Diesel Fuel Additive — 12×½ pt Pack, Injector Cleaning & Cold-Weather Protection

Stanadyne Performance Formula Diesel Fuel Additive (12 pack of ½ pint bottles) is a concentrated treatment designed to clean injectors, reduce fuel-related wear, and help restore lost fuel economy and power for diesel engines.

Stanadyne’s Performance Formula is a multi-purpose diesel fuel treatment formulated for routine maintenance and seasonal protection. Supplying a pack of twelve half-pint bottles (part #38564), this kit is sized for repeated treatments across multiple fill-ups or vehicles. It’s engineered to be compatible with ultra-low sulfur diesel (ULSD) and common B20 biodiesel blends while remaining safe for exhaust aftertreatment systems.

How does this additive improve everyday diesel performance?

When added to fuel, the formula helps remove and prevent deposits on injectors and intake components that can impair spray patterns and combustion efficiency. Cleaner fuel components allow the engine to run closer to its original tuning, which can translate into smoother acceleration and more consistent power delivery.

• Detergent agents help dissolve injector and combustion deposits.
• Friction-reducing components support smoother mechanical operation.
• Restores more complete fuel combustion for steadier throttle response.

Will it protect my engine in cold weather and with low-lubricity fuels?

The Performance Formula includes cold-weather and anti-gel elements that reduce the risk of fuel gelling and maintain flow in lower temperatures. It also provides lubricity boost for modern low-sulfur fuels, protecting fuel pumps and injectors from premature wear.

• Anti-gel agents lower cold-filter plugging tendencies.
• Lubricity enhancers safeguard high-pressure components.
• Corrosion inhibitors protect metal fuel system parts during storage and use.

How often should I use Stanadyne Performance Formula?

For routine upkeep, treat fuel at regular fill-ups to maintain cleanliness and performance. For deeper injector cleaning, pair with Stanadyne injector cleaner treatments several times per year for optimal results, following product dosing instructions on the bottle.

• Use with each fill-up for ongoing maintenance benefits.
• Apply specialized injector cleaner 4–6 times annually for heavier deposit control.
• The 12×½ pint pack covers many treatment cycles for one or more vehicles.

Is this additive compatible with my vehicle and emissions equipment?

Yes—this formulation is designed to be safe for engines fitted with modern emissions systems, including diesel particulate filters and SCR setups, when used as directed. It works with ULSD and up to B20 biodiesel blends without compromising aftertreatment performance.

• Exhaust-aftertreatment safe when dosed per instructions.
• Compatible with ULSD and B20 biodiesel blends.
• Non-corrosive additives reduce risk to fuel-system seals and components.

Who this product is for: Drivers, fleet managers, and diesel owners who want an easy, on-fillup solution to maintain fuel-system cleanliness, protect high-pressure components, and help recover lost mpg and power. The 12-pack is convenient for servicing multiple vehicles or keeping a seasonal supply on hand for commercial trucks, agricultural equipment, marine diesels, and passenger diesel cars. Use it regularly as part of a preventive maintenance routine and combine with targeted injector treatments for deeper cleaning when needed.