Stanadyne Performance Formula: All-Season Diesel Fuel Additive (1/2 Gallon, 64 oz)

The 64-ounce (half-gallon) bottle of Stanadyne Performance Formula, part number 38566, the complete all-season diesel treatment that cleans injectors, boosts cetane, restores fuel economy, adds lubricity, and protects against winter gelling. It is a convenient size for pickups, single trucks, and equipment owners.

What It Does

• Improves performance & horsepower: detergency plus a cetane improver clean up injectors and combustion for stronger, smoother power
• Restores fuel economy
• Cold weather & anti-gel protection: improves cold-flow operability so your diesel keeps moving in winter
• Lubricates, cleans & protects: restores the lubricity stripped out of today’s ultra-low-sulfur diesel, protecting injection pumps and injectors
• Corrosion preventative: guards the entire fuel system against rust and corrosion
• Exhaust aftertreatment safe: will not harm DPF or DEF/SCR systems, and helps reduce smoke and particulates
• ULSD & B20 biodiesel compatible

Trusted by the Engine Builders

It is made by Stanadyne, a fuel-systems company that has engineered diesel injection equipment for decades.

Coverage

See the bottle label for exact maintenance and clean-up treat ratios.

Why Buy It From Valley Fuel Injection & Turbo

We aren’t a general parts reseller. We’re diesel fuel injection specialists who rebuild the very pumps and injectors this additive protects. We’ve seen firsthand what dirty, low-lubricity fuel does to a common-rail system, and Stanadyne is what we trust to prevent it. As an authorized Alliant Power dealer, Valley Fuel Injection & Turbo has supplied genuine diesel parts and expertise across Northern California and Nevada since 1993.

Shipping note: Diesel fuel additives are classified as hazardous materials (DOT hazmat) and ship ground only within the continental U.S.: no air freight, no AK/HI.