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

The 64-ounce (half-gallon) bottle of Stanadyne Performance Formula — the complete all-season diesel treatment that cleans injectors, boosts cetane, restores fuel economy, adds lubricity, and protects against winter gelling. One bottle treats up to 250 gallons of diesel — 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 — independent testing shows an average 4% improvement in miles per gallon (gains up to 9.6%)
• 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

Performance Formula is approved or recognized by major OEMs including GM, Ford, John Deere, and Navistar, and meets the Cummins L10 injector cleanliness test — the same additive chemistry from Stanadyne, a fuel-systems company that has engineered diesel injection equipment for decades.

Coverage

Treats up to 250 gallons of diesel fuel (909 L). 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.