Re: Miles per gallon help
I used to have a 97 ZJ 4x2 with the 4L I6. When it was stock I averaged 18 MPG. I installed a K&N CAI, a Fastman TB, a Banks Torque Tube header, and had a custom 3" exhaust made. Then I started averaging about 22 MPG with my best recorded trip of 25 MPG. So, after installing about $2K of stuff (including a Hypertech tuner) on my $9K Jeep, I got about a 20% improvement in fuel economy.
However, the thing that made the most difference, was my right foot