Fuel Separation Systems on Diesel Vehicles


Has anyone used fuel separation systems like Fass Fuel on their diesel vehicles? What are its benefits?


I had the FASS fuel and oil system on my 04 duramax. Not sure what you are looking. Have you tried youtube?

This site hyperlinked in your post seems to have some good basic info.


I currently own my first diesel vehicle so I’m not sure how something like this would really help unless you’re constantly filling up with shit fuel. Maybe if I lived in the middle of nowhere and needed reservation gas, etc something like this would help. But $600+ for an unspecified fuel economy advantage seems a bit snake-oily to me. But hey, I’m new to this.



It’s mostly to protect the $$$$ injectors and high pressure pump.


Wow. 600 USD is a lot of money.