The car is a 2008 HHR Chevy with the 2.2 motor.
Mods:
1. lowered
2. Airiad intake filter
3. Complete 2.4 Exhaust system with a Cherry Bomb Vortex muffler
4. 2.4 intake manifold
5. Solstice wheels and tires. 10% taller than stock wheels
future mods are Trifecta tune and underdrive pulley.
There is no intake leak. For a baseline the mileage is
37 MPG @ 60
35 MPG @ 65
31 MPG @ 70
29.9 MPG @ 75
29.1 MPG @ 80
Those are with Air Conditioning on high.
I did not see a mileage log in the Ecomodders garage??