How air WRECKS your injection system…
June 27, 2025

If you picture contaminated fuel, what do you see? Dirt? Water? Particles of gunk?

If that’s the case—you’re not wrong. Diesel fuel is notorious for being a dirty, contaminated substance right out of the pump (even at $4+ a gallon).

But, believe it or not, the #1 contaminant in diesel fuel isn’t any of those mentioned above—it’s air. You read that right, air. Of all the things you’d think could rob horsepower, reduce fuel mileage, and damage your diesel engine’s injection system, air is the worst of them all.

In this quick video, Brad walks you through the concept of cavitation—a problem that’s directly caused by the air that’s trapped in your fuel!

If you didn’t know, FASS actually stands for Fuel Air Separation System. When Brad founded FASS, one his primary goals (hence the name) was to eliminate the headache and expense of having air-filled fuel.

Simply by removing the air from fuel, a FASS Diesel Fuel System:

  • Improves fuel lubricity 10%
  • Can increase the life of fuel injection components by 3x
  • Restores horsepower
  • Sharpens throttle response
  • And more!

If you have questions about a FASS Diesel Fuel System for your diesel, contact us today!

 

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