CALCULATE YOUR REAL WORLD FUEL SAVINGS
Calculate Your Fuel savings
Conventional Filter | FASS System | |
125,000 | Average Yearly Miles Driven | 125,000 |
6.5 | Average MPG | 6.9 |
19,231 | Gallons Per Year | 18,116 |
$3.30 | Cost Per Gallons | $3.30 |
$63,462 | Fuel Cost Per Year | $59,782 |
1 Year Savings!
$3,680
5 Year Savings!
$18,400
FASS Authorized Dealer NetworK
FEATURES, BENEFITS, & ROI WITH FASS


Increased Service Life Of
Fuel Injection Components.
Removing Air & Vapor will not only reduce “Cavitation” to injection components it will increase lubricity by at least 10%. This increased lubricity can prevent “Galling” and “Scoring” while increasing the fluid damping effect in the cup of the injector as intended. Reducing the potential damage to the injector tips and wear to expensive fuel injection components. Air/vapor exiting the injector has a cutting torch affect on the injector nozzle reducing the atomization over a period which not only reduces life of the injector but reduces performance of the engine.


Increased Fuel
Economy
With the longer burn discussed under “Increased Horsepower and Torque” a fuel mileage increase is “AVAILABLE” due to the simple fact there is now a more complete combustion, therefore, needing less fuel to perform the same task.


Increase Life & Decreased
Service Intervals Of Your DPF
Removing the Air & Vapor will restore injection timing thus creating a more complete combustion event, resulting in less soot accumulation in the Diesel Particulate Filter.


Extreme Cold Weather
Operation
FASS provides two options for improving Cold Weather Performance. Two Electric Heater Ports and ports to run coolant. These options combined with FASS Mass Flow Return Technology (Fuel Polishing feature) will aid during cold weather starts and help prevent your diesel fuel from gelling.


Increased Horsepower
And Torque
Removing Air & Vapor will consistently provide correct injection timing (as designed by the manufacturer in test cell conditions) thus creating a more complete combustion event due to a longer burn producing an increase in horsepower/torque. Fuel injection timing is “Critical” to engine performance!
What is FASS
FASS Diesel Fuel Systems are the #1 Fuel/Air Separation System for fleets & owner-operators worldwide. FASS Diesel Fuel Systems are designed to optimize engine performance–including torque/power, fuel economy, idle quality, throttle response & more.
Have you noticed how much better the engine performs with a full tank of fresh, cool fuel when compared to a 1/4 tank of hot fuel that’s been agitating all day? It goes without saying that a truck full of cool fuel performs much better.
By keeping your engine supplied with fresh, polished fuel, your truck stays at peak performance–day in, day out. With a FASS, you can say goodbye to the days of inconsistent performance caused by fuel starvation, air & vapor! Delivering purified fuel without air & vapor not enhances performance, but also increases the life of the fuel injection system.

Fuel Mileage Testing Results
1 – Hour Dyno Test Completed Using Cat C15 Engine Certified third party test – Realworld Conditions will vary
We understand that a class 8 truck doesn’t average 75mph and probably doesn’t average 58% work load in most areas. But they do average around 125,000 miles per year. If we use those calculations from the Caterpillar dyno test with the stock fuel filter the engine got 3.15mpg and with the FASS got 3.76mpg. an increase in fuel mileage of 0.61mpg. This is interesting as we tell potential customers that there is a solid 0.4mpg to be had, however on this engine 0.7-0.9mpg increase is not unheard of. So let’s go to the conservative numbers of 0.4mpg.
Saved 3.83 Gallons
of fuel in 1 Hour!
Conventional Filter vs FASS System | Run Time | RPM | MPH | Engine Load % | Starting Fuel Weight/Gallons | End Fuel Weight/Gallons | Fuel Consumption | Fuel Savings!! |
Conventional Filter | 1 Hour | 1600 | 75 | 58% | 260 pounds, 37.45 Gallons | 95 pounds, 13.68 Gallons | 165 pounds, 23.77 Gallons | |
FASS System | 1 Hour | 1600 | 75 | 58% | 254 pounds, 36.58 Gallons | 115.5 pounds, 16.63 Gallons | 138.5 pounds, 19.94 Gallons | 26.5 pounds, 3.83 Gallons |
Conventional Filter vs FASS System | Conventional Filter | FASS System |
Run Time | 1 Hour | 1600 |
RPM | 1 Hour | 1600 |
MPH | 75 | 75 |
Engine Load % | 58% | 58% |
Starting Fuel Weight/Gallons | 260 pounds, 37.45 Gallons | 254 pounds, 36.58 Gallons |
End Fuel Weight/Gallons | 95 pounds, 13.68 Gallons | 115.5 pounds, 16.63 Gallons |
Fuel Consumption | 165 pounds, 23.77 Gallons | 138.5 pounds, 19.94 Gallons |
Fuel Savings!! | 26.5 pounds, 3.83 Gallons |
HOW IT WORKS

YOUR ROADMAP TO MAXIMIZING ENGINE PERFORMANCE AND EXTENDING THE LIFE OF YOUR IMPORTANT ENGINE COMPONENTS
eBook: FREE Fuel Contaminants Guide exploring real world conditions versus
manufacturer’s test cell
Throughout this guide, we’ll be referencing documents from manufacturers such as Bosch, Caterpillar, Cummins, Detroit
Diesel & Racor/Parker just to name a few. We’ll be covering their findings on how air & vapor develop and how it affects
the dependability of your injectors and engine performance.
Download this eBook to learn:
- Do we completely understand how air and vapor enter a closed system?
- Do we realize the negative impact they have on our diesel engines?
- How does this affect my bottom line?
- How will a FASS system provide more dependability & improve our bottom line?
- How does FASS legitimately make the claims?
- If it is so good why don’t the engine manufacturers use it?
Download the Free Fuel Contaminants Guide
In depth details on how air in fuel negatively affect your engine’s performance
