Part No. 81012


Penray Diesel Fuel Prep™ is specifically concentrated for light duty vehicles to improve performance. Diesel Fuel Prep™ is formulated to clean the engine to restore power and maximize fuel economy!

Benefits of Penray Diesel Fuel Prep™:

  • Concentrated year-round diesel fuel conditioner for auto and light duty engines
  • Cleans fuel injectors to maximize fuel economy and restore power
  • Improves performance Lifts cetane up to 8 numbers
  • One bottle treats 20 gallons for an 8 cetane* number lift, 40 gallons for a 4 number lift
  • Biodiesel compatible and ULSD compliant
Part # Quantity Net Contents Container Treat Rate
81012 6 / Case 12 fl. oz. Bottle 20-40 Gallons
*Treat 20 gallons for 8 number lift, 40 gallons for 4 number lift

This product can expose you to chemicals including Naphthalene, which is known to the State of California to cause cancer. For more information go to