It's worth a try. Where do you buy it? On TV
I would like to see longer distance test results. With short distances the calculations can be effected by changes in the ammount of gas used to refill and I am sure teh gas pumps and gas guages aren't 100% accurate.
Mayb use a GPS for distance measurement?
See the difference in just 0.3 gallons used...
73.3 miles divided by 3.3 gallons equals 22.21 mpg. or
73.3 miles divided by 3.0 gallons equals 24.43 mpg
I'll stick to the Vornado and fuel line magnets.