Thanks for the responses.

We have a 2006 VortecMaxx that gets horrible fuel mileage. It is a conversion truck with 4.10 gears and 35 inch tires. It gets a whopping 12mpg.

Right now, Allen is working on the WS6. We are thinking about taking this truck out there to pick up the car when it is ready. As such, we are considering a tune. That would be the only reason we drive this one and not my powerstroke. <-18mpg with all kinds of power enhancing upgrades.

So I wanted to see what you folks found with your tunes. Is it worth it from the standpoint of fuel mileage?