Idle Consumption Data
This isn't really scientific or anything, just some numbers from a recent drive in a friend's car.
2010 VW Jetta Sportwagen 2.5L 5-cyl
Idle fuel use numbers found by keeping a constant speed down hill in neutral. I let each set stabilize for while and used the brake to keep the speed constant.
200 MPG @ 56.5 MPH
145 MPG @ 40 MPH
72 MPG @ 20 MPH
50 MPG @ 15 MPH
Average is 3.525 Hours per Gallon
Comes out to 0.284 GPH or 0.00473 GPM (Gallons per Minute)
Thought that might be kinda useful, I'm sure other people do this for other cars...
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