So, the truck's EPA rating is 24mpg mixed.
The way I drove it I got 28ish mixed.
With the additions, I get 33ish mixed.
Under ideal driving, (flat and 55, not tailwind and downhill) I hope to get 36.
I'll keep adding new data. I just moved from Seattle to Jackson Hole though, so I'm not sure how the 6,000 ft. gain will effect it.
Here's a few pics of it:
Picasa Web Albums - Conor - Greenhouse
Next projects are mid-grade gas and better hub caps. Then belly pan.