2016+ Titan General Forum
I have a 2019 pro4x with a k&n cold air intake and a fitch fuel catalyst since adding the fuel catalyst my mpg has gotten way better. Before adding it I was averaging 16 to 18 mpg at around 65 to 70 mph on 93 octane. After adding the fitch fuel catalyst my mpg has been at around 21 to 23mpg at...