Update 3/23/11
Year: 2005
Make/Model Toyota Tundra
Engine Type: Gas - V8
Before: 15 MPG
After: 15 MPG
This is my update after my 1st full tank of gas. I was disappointed to see that I was only getting 15 miles per gallon. I drove 350 miles all local streets and refilled the tank w/ 23 gallons. 350 mi/23 gal = 15.2 MPG. I think that my original calcultation of 24 MPG after 2 gallons was premature and due to variability with the gas pump. I topped off the tank and drove the full tank of gas which should be more accurate. Before the DV, I was getting about the same 350 miles per full tank. I'll continue to monitor and report back.
Year: 2005
Make/Model Toyota Tundra
Engine Type: Gas - V8
Before: 15 MPG
After: 24 MPG
I was anxious to see what the DV does for my MPG. Filled up my tank, drove 50.9 miles over 3 days (my usual commuting) and then filled up again at the same Mobile pump. The tank took 2.14 gallons to refill. 50.9 miles/2.14 gal = 23.79 miles/gal. This is short distance of driving and there may be variables (pump consistency), so I'll report back how many miles I get on the whole tank.