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Stanadyne Performance Formula® protects your diesel engine and improves engine performance. The cetane improver in Performance Formula will increase horsepower, torque, and fuel economy. Regular use of Stanadyne Brand Performance Formula will more than pay for itself. To calculate your annual savings, use the Performance Formula Fuel Savings calculator.

Calculations are based on a 4%-12% increase In fuel economy and recommended list pricing of our Performance Formula. Actual savings will vary and are dependent on fuel quality, driving conditions, and driving habits.
Stanadyne Brand Fuel Additives

The heart of your diesel engine is its fuel injection equipment and the major enemy of this equipment is poor quality diesel fuel. From extensive research and testing, Clarcor found that variations in diesel fuel quality around the world can adversely affect today’s precision fuel injection systems. Poor quality diesel fuel can cause performance issues, premature wear, gumming of components, and plugged filters. To resolve these issues and to provide protection of the fuel injection system, Clarcor developed its own line of diesel fuel additives.

Stanadyne brand diesel fuel additives are the only ones in the world that are:

  • Developed by a fuel injection systems manufacturer
  • Tested and approved by major diesel engine and vehicle manufacturers
  • Proven to perform best in independent tests

Stanadyne diesel fuel additives protect and improve the performance of all diesel fuel injection systems including:

  • High pressure common rail
  • Unit injectors
  • Rotary distribution pumps
  • In-line pumps

Stanadyne diesel fuel additives comply with federal low sulfur content requirements for use in diesel motor vehicles and non-road engines.

Dealer Locator
Stanadyne Diesel Fuel Additives can be purchased from all authorized Stanadyne service locations in North America. There are other limited locations throughout the world that carry Stanadyne Performance Formula.

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Buy Online
Stanadyne Fuel Additives are now available from participating AutoZone and Tractor Supply locations. Click on the logos below to find a store near you. AutoZone Store Locator Tractor Supply Store Locator
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