ROI Series | 2011-2016 Chevrolet/GMC with 6.6 Duramax

Jake H • January 21, 2025

If you’ve ever wondered about the return on investment (ROI) of a FASS Fuel System, this is the video series for you! In our ROI Video series, we’re discussing the science behind FASS, and how we’re able to save our customers (in many cases) thousands of dollars.

In the coming weeks, we’ll cover the various engines and platforms we fuel system and filtration upgrades for—starting with 2011-2016 GM trucks powered by the 6.6 liter LML Duramax.

Please note: MPG improvements depend highly on the owner’s driving habits, record-keeping methods, fuel quality, and more. While observing increased fuel economy is extremely common after installing a FASS Fuel System, we cannot guarantee a measurable MPG improvement.

Have questions about a FASS Diesel Fuel System for your Duramax, Powerstroke, or Cummins-powered truck? Contact us today!

We’re proud to be a family-owned, U.S.-based manufacturer. From our production facility in Marthasville, Missouri, we serve diesel owners around the world.

< Older Post

Newer Post >

Are FASS Fuel Filters actually good?

By Jake H • June 23, 2026

Are FASS Fuel Filters actually good? You'd better believe it—our fuel filters are second to NONE, and we've got the data to back that up.

Are FASS Fuel Systems Universal?

By Jake H • June 22, 2026

Are FASS Fuel Systems universal? Learn the differences between Drop-In, Titanium Signature, PLUS, No-Drop, and Industrial Series PLUS systems.